Are you looking for some inspirational sister-in-law quotes and birthday greetings to brighten up your sister-in-law’s day? Bravo! Then you’ve arrived at the right spot. We have collected a list of the best sister-in-law quotes and unique birthday wishes to help you express your true feelings for your sister-in-law, as well as some fun sister quotes for good measure.

As we all know, sharing an unbreakable bond with your sister-in-law is a great blessing in this world. Although you presumably did not grow up together, still, she is a member of your family and has a significant impact on your existence.

If you want to show her how much you appreciate and adore her, text her one of these amazing quotes and birthday wishes – we are sure she’ll be overjoyed after reading them!

Best Sister-in-Law Quotes to Brighten Up Her Day

Here, we have compiled a list of some of the best sister-in-law quotes to cheer her up and brighten up her day. Let’s read them one by one. 

1. “Sister-in-law by chance, friends by choice.” — Unknown

2. “You are more than a sister-in-law; you are my sister.” — Unknown

3. “Sisters-in-law are like the other women in a relationship.” — Unknown

4. “On the day of the wedding, our families will blend. You’ll be my sister and also my friend.” — Unknown

5. “Sister-in-law—a lifetime supply of love and support traditionally given to a bride on her wedding day.” — Unknown

6. “Your sister isn’t always your blood relation; sometimes it’s that close friend who understands you, loves you, and has always got your back.” — Unknown

7. “Our friendship grows, yet stays the same, for sisters-in-law we became. Yet she is so much more, for she has become a sister that I adore.” — Unknown

8. “I am so thankful that you are my sister-in-law. I have learned so much from you, and I can honestly say that you are a blessing to our family.” — Unknown

9. “Even though we live miles apart, you will always be dear to my heart. So, to you, a special love I send, to not just my sister-in-law, but also my friend.” — Unknown

10. “Sister-in-Law, you are someone that I can talk to, someone I can lean on, and someone that understands me. You are much more than just my brother’s wife, and you are my friend.” — Unknown

11. “Happiness is annoying your sister-in-law.” — Unknown

12. “The greatest gift my brother ever gave me was you.” — Unknown

13. “If the marriage were valid, she’d be your sister-in-law.” — Cassandra Clare

14. “In the cookies of life, sisters-in-law are chocolate chips.” — Unknown

15. “I am writing a book on my sister-in-law, which is called jealous.” — Unknown

16. “If you want to know how old a woman is … ask her sister-in-law.” — E.W. Howe

17. “I smile because you are my sister-in-law. I laugh because you are married to my brother.” — Unknown

18. “I smile because you’re my sister-in-law, and I laugh because there’s nothing I can do about it!” — Unknown

19. “I started walking at night with my sister-in-law which has been amazing. It really does something for you.” — Ashley Scott

20. “Happiness is going shopping with my sister-in-law. She’s got the traits of my husband that I like, with the added bonus of her love of shopping!” — Unknown

21. “Sisters-in-law are a special kind of family.” — Unknown

22. “By luck, we became sisters; by love, we became friends.” — Unknown

23. “If I didn’t have you as a sister-in-law, I’d choose you as a friend.” — Unknown

24. “I’m so glad that I have a wonderful sister-in-law like you in my life.” — Unknown

25. “When I think of all the blessings in my life, my sister-in-law is right there at the very top of the list!” — Unknown

26. “They can call you sister-in-law or my brother’s wife. It doesn’t matter. You’re a special person in my life. You’re like my sister.” — Unknown

27. “Having a sister-in-law like you makes life so much easier. It’s like I didn’t just gain a partner in life, but I also got a new sister that I can talk to about anything!” — Unknown

28. “No one relationship is without its share of problems, but with you, I’ve seen a sister ready to form a bond with me with all trueness of heart. Thanks, dear sister-in-law.” — Unknown

29. “Sister-in-Law, you are someone that I can talk to, someone I can lean on, and someone that understands me. You are much more than just my brother’s wife; you are my friend.” — Unknown

30. “To lose a brother is to lose someone with whom you can share the experience of growing old, who is supposed to bring you a sister-in-law and nieces and nephews, creatures who people the tree of your life and give it new branches.” — Yann Martel

31. “You keep your past by having sisters. As you get older, they’re the only ones who don’t get bored if you talk about your memories.” ― Deborah Moggach

32. “Sweet is the voice of a sister in the season of sorrow.” ― Benjamin Disraeli

33. “It is natural not to care about a sister, certainly not when she is four years older and grinds her teeth at night.” ― Gertrude Stein

34. “What are sisters for if not to point out the things the rest of the world is too polite to mention.” ― Claire Cook

35. “Airport Cars UK are always helpful and on time when we go on holiday. They have also done themselves proud with the executive people carriers at my sister-in-law’s wedding.” ― Shane Richie

36. “If your sister is in a tearing hurry to go out and cannot catch your eye, she’s wearing your best sweater.” ― Pam Brown

37. “I was in fashion school, my brother has a law background, and my sister-in-law had worked in production, but none of us had a proper fashion business education.” ― Alexander Wang

38. “Sister is probably the most competitive relationship within the family, but once the sisters are grown, it becomes the strongest relationship.” ― MargaretMead

39. “I have the best sister-in-law in the world, and I’m not just saying that because I’m afraid she’ll read this and kill me.” ― Jimmy Fallon

40. “A sister can be seen as someone who is both ourselves and very much not ourselves – a special kind of double.” ― Toni Morrison

Funny Sister-in-Law Quotes 

Here, we have compiled a list of some of the funniest sister-in-law quotes to make her laugh and make her day joyful. Let’s read them one by one.

1. “In the cookies of life, sisters are the chocolate chips.” – Unknown

2. “If you don’t annoy your big sister for no good reason from time to time, she thinks you don’t love her anymore.” – Pearl Cleage

3. “If you mess with the big sister, there is always a younger, crazier sister behind her… that’s who you don’t want to mess with!” – Unknown

4. “My sister… is the person who keeps me in line, whether I like it or not. I trust her and also have a good, healthy fear of her.” – Katy Perry

5. “We are sisters. If I am mad at someone, you are mad at them, too. End of story.” – Unknown

6. “Having a sister is like having a best friend you can’t get rid of. You know whatever you do, they’ll still be there.” – Amy Li

7. “If your sister is in a tearing hurry to go out and cannot catch your eye, she’s wearing your best sweater.” – Pam Brown

8. “When my sister, Joan, arrived, I asked if I could swap her for a rabbit. When I think what a marvelous friend she’s been, I’m so glad my parents didn’t take me at my word.” – Maeve Binchy

9. “I grew up believing my sister was from the planet Neptune and had been sent down to Earth to kill me. I believed this because my sister Emily convinced me of it when I was a toddler… There’s a part of me that still believes it. I have moments when I think, ‘Hmm, could that be true?’ Occasionally I ask my sister about it, and she responds by pulling an alien face, which only confuses matters.” – Zooey Deschanel

10. “If you don’t understand how a woman could both love her sister dearly and want to wring her neck at the same time, then you were probably an only child.” – Linda Sunshine

Mothers’ Day Quotes for Sister-in-law

Send one of our best Happy Mother’s Day wishes for sister to express your gratitude for everything she does as a mother at this perfect moment! Share with your sister-in-law a Happy Mother’s Day Wishes as Mother’s Day draws near to let her know how much you value her.

Happy Mother’s Day wishes are an ideal way to show your love for your best friend, support her, and share in the accomplishments. Make your sister’s day by giving her happy Mother’s Day wishes, support her and embrace her efforts as a mother.

1. Happy Mother’s Day To A Fabulous Sis! I hope your day is filled with as much fun and laughter as we made as children!

2. Happy Mother’s Day, Sis. Your children made you a mother, but it’s your sweetheart and loving actions that make you great. I love you!

3. Happy Mother’s Day. The love for your children is as beautiful as a flower. You’re a great sister and an even better mother.

4. To My Wonderful Sister, Happy Mother’s Day. Being sisters together was magical, and being mothers together is so much better. You are the best mother I know, and you inspire me every day.

5. Happy Mother’s Day. I wanted you to enjoy a relaxing Mother’s Day, so here’s a glass on me.

6. Happy Mother’s Day, Sis! I know you’d rather have a beer than flowers, so here’s a pint for me!

7. To my dearest SISTER, I always knew you’d make an excellent mother. Growing up, you were the best at coming up with new games to play. I’ll be reminiscing about all our shared fun times for the rest of today!
8. SISTER, your presence is a bright, shining light wherever you are. I hope you enjoy a beautiful day with all your children.

9. You are the sweetest sister in the whole wide world and an amazing mom. I hope you enjoy some treats today. You deserve them!
10. To a beautiful and thoughtful mama, my own dear sister.

May your day be as beautiful to you as you are to the world.

11. Wishing my incredibly creative sister a very Happy Mother’s Day. May you enjoy a blissful day of relaxation and love. And perhaps some coffee and cookies!

12. Happy Mother’s Day to an awesome sister! May all the love you give out on daily basis come back to you a hundredfold.

13. May your day be even sweeter than a cupcake, sister!

14. May your Mother’s Day be full of handmade cards and giggles.
I love you, sister!

15. Wishing a happy holiday to a very special woman—my sister!

16. To my dear sister:

I hope you spend today getting pampered the way you deserve!

17. Today is all about you! Enjoy that breakfast in bed, sister. Happy Mother’s Day!

18. I hope you get out and enjoy some sunshine today. I’m so glad you’re my sister, have a wonderful day!

19. Here’s hoping you get lots of flowers, cards, and hugs today! You deserve it all, mama.

20. Happy Mother’s Day to my beautiful sister. You are an inspiration to me (and to many other mothers, I’m sure!).

Happy Birthday Wishes for Sister-in-law

Birthday greetings are written with the love and affection you have for the celebrant. The sweet messages on our selection of happy birthday wish for my sister-in-law are all very nice. You can share a few of these birthday greetings with your sister-in-law or use them as ideas for a more unique note that might make her smile.

1. Wishing my amazing sister-in-law, a splendid day filled with happiness and laughter. Happy birthday

2. Happy birthday! It is so great to have an awesome sister-in-law like you. Enjoy your day to the fullest, dear.

3. A caring nature, and a loving heart, for the beautiful person you are, wish you the most enjoyable day. Happy birthday, sis-in-law!

4. I hope this year is filled with happiness and that you reach new heights. Happy birthday, my sweet sister-in-law.

5. Happy birthday to the most awesome sister-in-law. Wishing you the biggest and most fantabulous celebrations as you deserve the best of all.

6. Having you as my sister-in-law is a wish come true. I hope you have a wonderful year with all your wishes fulfilled. Happy birthday!

7. Happy birthday to an exceptional sister-in-law. May all your wishes come true.

8. Happy birthday, darling sister-in-law. You make every day brighter with your smile. I hope you are spoilt with surprises today and forever.

9. Dearest sister-in-law, I am lucky to have you as my best friend. I couldn’t have asked for any better. Happy birthday.

10. To the dearest sister-in-law, sending you the brightest wishes for today while you celebrate another wonderful year. Happy birthday.

11. Happy birthday to my gorgeous sister-in-law. Sending all the love, thoughts, and prayers your way. I hope your day is full of beautiful and memorable moments.

12. To my terrific sister-in-law, Happy birthday! Tip up your hats and hang up the streamers. We are celebrating the birthday of one of our dreamers!

13. To the dearest sister-in-law, sending you the brightest wishes for today while you celebrate another wonderful year. Happy birthday.

14. Happy birthday to my gorgeous sister-in-law. Sending all the love, thoughts, and prayers your way. I hope your day is full of beautiful and memorable moments.

15. To my terrific sister-in-law, Happy birthday! Tip up your hats and hang up the streamers. We are celebrating the birthday of one of our dreamers!

16. Happy birthday, sister-in-law. Another year was well-lived and spent. Thanks for giving us another reason to throw a bash!

17. Happy birthday, sparkling sister-in-law. I hope you are ready to be spoilt with loads of love and gifts today.

18. Happy birthday, sister-in-law. It takes a lot to make a family. Indeed, I don’t know how ours would have been without you.

19. Happy birthday to my adorable sister-in-law. As much as we try, you outshine the brightness of the candles.

20. Happy birthday, awesome sister-in-law. You are sweeter than candy. Today, we celebrate the vibrancy that you bring along.

Best Sister-in-law Poems 

Let’s have a look at some of the poems to show your love and appreciation toward your sister-in-law, who is your best friend. 

1. Welcome To The Family

Poet: Catherine Pulsifer

By marriage, we are now related

But I have to tell you I am elated.

A sister-in-law like you

How blessed I am; that is true!

You married my brother

Now you’re part of the family like no other

Like every family, we have our quirks

But also we have some neat perks.

Support and love we do give

And life, we do live.

You can always count on us

To help out without a fuss.

To our family, we welcome you

You a welcome part of our crew.

2. Merry Christmas

Poet: Catherine Pulsifer

To a dear Sister-in-law, I wish,

This Christmas day, you feel so rich

Surrounded by family and friends

Merry Christmas wishes I do send.

And may the New Year be a good one

Bringing you success and a lot of fun

Merry Christmas and Happy New Year

To you and our brother, dear.

3. Sister In Law Like You
Poet: Catherine Pulsifer

A sister-in-law like you
Is more than a dream come true.
Thank you for all you do
People like you are far and few.

You’re always willing to lend a hand
And always willing to take a stand
We don’t say it enough, we love you
And we appreciate you too!

4. By Law

Poet: Catherine Pulsifer

They say by law you are our sister

A law that sometimes is a whisper.

But we shout for joy and are glad

Good sense, our brother; he did have

For once in his life, he did it right

When you asked you to be his wife!

5. Some Like You
Poet: Catherine Pulsifer

Sister in laws, some are small, and some are tall
Some help you up, and some let you fall.
Some are helpful, and some do mind,
But some, like you, are one of a kind.

Sisters-in-law, some are determined to have it all
Some are whining and often bawl
Some hold in, and some do share
But some, like you, truly do care

Sisters-in-law, some are negative
Some are like long-lost relatives
Some don’t like anything we do
But some, like you, are loved; that’s true.

6. A Sister

Poet: Catherine Pulsifer

You love our brother. We can see

And we can’t wait until you two are three.

Your wedding seems like only yesterday

And now, years have passed, and it is a memory.

Truly a friend you have become

You always make us feel welcome

We are so glad our brother married you

A sister, you, we do view.

7. Happy Birthday Sister In Law

Poet: Catherine Pulsifer

I wish you a happy birthday

Another year, but that’s okay!

Don’t focus on the number or the age

Be thankful you have reached this stage.

Hoping your birthday is filled with laughter

And the coming year is even better!

Wrapping Up

You will value your sister-in-law more than just about anything else. If you opt to have children, she will also be an aunt to them. Aunts are the best, too! She will be to your parents like another daughter. If your sister is your best friend and makes your life happier, let her know. Possibly these sister-in-law quotations and wishes will help you to mend fences with your sister-in-law if you don’t get along with her. Do you have an in-law sister? What are some of your favorite experiences or moments you two have shared? Let us know which quote or birthday wish you loved the most.