Meaningful birthday wishes for sister My life is better with you in it. Happy birthday, sis! You’ve been my best friend for decades, and I can’t wait for another year of fun. Happy birthday ...

Birthday wishes for sisters, sister-in-law, or someone like a sister to you should make them feel loved and celebrated. Find funny, heartwarming messages here.

Happy birthday, sis! Happy birthday to my built-in bestie. I'm so lucky to have you as a sister. Wishing you the best birthday ever, sis. Happy birthday to the most wonderful sister-in-law.