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30+ Perfect Ways to Say Happy Birthday Sister In Law

Looking for the perfect words to wish a happy birthday to your sister in law? Today we are sharing sweet, thoughtful and funny quotes that are perfect to wish your sister in a law a happy birthday.

Happy Birthday Wishes For Your Sister In Law

It’s your sister in law’s birthday and you’re looking for the perfect quote, saying or message  to write in her card or caption an image of the two of you on Instagram.

The connection you share to your sister in law is like no other.

You didn’t grow up together, and yet she is the only other person who knows what it’s like to live with your brother.

While it may be difficult for you to understand how anyone would ever want to marry your brother (or your husband’s brother), you’re glad she did because you gained a wonderful sister in law in the process.

Now, you’re looking for just the right words to let her know how much her friendship means to you and how happy you are that she became a part of your family.

The two of you became family overnight, but your relationship and friendship has grown over time and now she’s more than just a sister-in-law, she’s your sister and even if you don’t always get along you want to choose the perfect happy birthday message for her. 

The Best Happy Birthday Sister In Law Quotes

Happy Birthday to my sister in law. May you continue to bring smiles to all who know you, love you and are lucky enough to be your family.

Happy birthday to my kind and loving sister in law who is so much fun to be around!

You’re more than just my sister-in-law, you’ve become my friend. I will always be here for you and to celebrate with you. Happiest of birthdays to you!

Happy Birthday to a very special sister-in-law! Wishing you the best of everything today and every day! 

Having you as a sister-in-law is such a gift. I hope all of your birthday wishes come true and that this year is full of fun, laughter and love.

Happy birthday! Thank you for all the ways you bring laughter and joy into our family.

Happy birthday to my sister in law. May your day be filled with fun, your gifts be plenty and may all your wishes come true in the year ahead.

Happy birthday to the best sister in law ever!

A loving heart, a caring nature and sweet soul. I wish you a very happy birthday.

Our friendship has grown so much over the years. Having you in our family means so much to me! Happy Birthday!

I am so happy to call you my sister in law. You are kind, funny, brave and generous. May your birthday be just as sweet as you.

There are certain things in life that exceed your expectations and you are one of them. Happy birthday to my amazing sister in law.

I am so thankful that my brother chose such an amazing woman to become my sister in law. I love you and I hope you have a wonderful birthday!

You’re more like a sister than a sister-in-law, we’ve done too much crazy stuff together! Happy birthday to my partner in crime.

I am so lucky to have you as a sister in law. May your birthday bring you a year full of laughter, love and joy.

Cheers to you on your birthday and to another year of you being the most amazing sister in law on that planet.

Life is full of surprises, including the one where you and I became best friends. Happy birthday!

Thank you for being such an amazing sister in law. My wish is that you have an amazing birthday and that our relationship continue to grow year after year. 

Happy Birthday dear sister-in-law. May you have a birthday as wonderful as you!

Happy Birthday to the best sister in law! We are so lucky to have you in our family and I look forward to another year of friendship, laughter and making memories with you.

Happy Birthday to my beautiful sister in law. Your kind heart and gentle spirit are even more beautiful than your smile. Have a wonderful birthday. 

A very Happy Birthday to a wonderful sister in law. You are such a sweet person. I am fortunate to call you my family, sister and friend.

Happy Birthday to my future sister in law! The best decision my brother ever made!

Happy Birthday to my lovely sister in law. Cheers to another year of friendship, fun and family! 

You’re more than a sister in law, you’re my sister and my best friend. Happy Birthday.

Funny Birthday Wishes for Sister In Law

Happy Birthday to the sister in law who has the best sister in law in the whole world!

Happy Birthday Wishes to the brave woman who has the strength and determination to put up with my brother.

Let’s celebrate another year of you surviving life with my brother.

Happy Birthday to my much older sister in law.

Happy birthday to my amazing sister in law, from her equally amazing and gorgeous sister in law.

Happy birthday to my ex-sister-in-law (who I still like more than my brother).

Happy birthday to the only sister-in-law crazy enough to fit in perfectly with our family.

It’s a good thing you married my brother, it would be really hard to find another family crazy enough for you to blend in with. Happy Birthday!

I love that you don’t have to say a word to let me know I’m her favorite sister in law. Happy Birthday!

There you go! Over 30 funny, thoughtful and sweet quotes to wish your sister in a law a very happy birthday!

In conclusion:

We hope that you found just the right words to celebrate your sister in law’s birthday.

Whether she lives across the country and you’re sending them to her in a card or you are posting a happy birthday wish for her on Facebook we are sure that she will feel special receiving your message.

More Quotes, Captions and Sayings: 

Photo of two women together text: Perfect Happy Birhtday Sister In Law Quotes

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