Blake started out scribbling in cards over 30 years ago. Though his handwriting is mostly unchanged, the content has improved.

What to Write to Your Daughter-in-Law

First of all, a birthday message for your daughter-in-law doesn't have to be specifically about your relationship to her. You can write your message in any style that you think will fit her personality. You can write a birthday poem, a birthday quote, or even a Christian birthday message if she's religious.

If you're looking for ideas about what to write in your daughter-in-law's birthday card, the examples below may help. These messages are specifically tailored to the "in-law" relationship.

Funny Daughter-in-Law Birthday Messages

Use one of these birthday wishes if your daughter-in-law has a good sense of humor.

1. Anyone brave enough to marry our son deserves a great birthday. We're glad to have you as our daughter-in-law.
2. I looked for the perfect gift for you, but I couldn't find anything that was good enough. Then I remembered that I already made a great gift for you. He's my son and your husband. Enjoy your gift!
3. When you married our son, you married into a family that knows how to celebrate birthdays. And your birthday is no exception.
4. Make sure your husband treats you well on your birthday. That's how we raised him, and you deserve the best on your special day!
5. My only problem with you is that you are just too perfect. Your beauty overshadows your mother-in-law. Seriously, stop it!
6. Since you hate birthdays, we're wishing your mom a happy labor day.
7. We are nominating you for the daughter-in-law of the year award, but today you are the best candidate for the Happy Birthday party.
8. I know you're my only daughter-in-law, but you're still my favorite!
9. What can you buy for the woman who already has everything? You already have good looks, a nice husband, and a great mother-in-law!
10. My wish for you is a calorie-rich birthday cake, so you can look more like your old mother-in-law.
11. Our son is a lucky man, and he'd better treat you extra special on your birthday. Tell him Mom said so!
12. My grandkid's mama is looking better than ever! When are you going to actually age?
13. With all the mean mothers-in-law out there, I thought I'd take the time to remind you how lucky you are. That's the best gift I could give you on your birthday.

Sincere Birthday Wishes for a Daughter-in-Law

Here are some more sincere happy birthday messages for the girl who married your son.

1. You may not have been born into our family, but you seem to be born to be part of it.
2. Your birth into this world led to our family receiving a great gift. We are happy to have you as our daughter-in-law!
3. When our son chose you as his life partner, he changed our lives for the better.
4. We are so blessed that you have become a part of our family. With love on this day and always, happy birthday to you, daughter-in-law.
5. Thanks for choosing our family as your own. We're glad to have you in our family.
6. Do you know what you get when you cross a princess with a prince? My grandchildren. Thanks for being their mom. You are special, and we wish you the very best birthday!
7. Birthdays are a great excuse to throw a party, especially when the birthday girl is so deserving of a celebration.
8. I wasn't there when you were born, but I love you like I was. I'm proud to have you as my daughter-in-law.
9. How can I count the ways you are a great daughter-in-law? I can't because there are too many.
10. You make us smile and we're happy you're in our lives. We hope your day is wonderful.
11. I used to long for a daughter, but then our son married you. Now I have a daughter to treat in a special way on her birthday.
12. You've helped to build a happy family by including us in yours. We're pleased that you are our daughter-in-law and send wishes for your day to be exquisite.
13. I need to call your mother and tell her thanks for sharing you with us. You're a lovely and classy daughter-in-law.
14. When you called me mom, it made me feel so good inside. I hope that you can feel just as special on your birthday.
15. After all of these years have passed, I still think you're the best daughter-in-law in the world. Today, I'm just making sure you know that you always will be.