Happy birthday from your better-looking and totally awesome younger sibling!
It can’t have been easy growing up with me, especially as I would get away with anything! Don’t feel bad though, sis, the younger sibling is always the favorite of the family!
I know exactly how you must feel on your birthday today since you make each and every day feel like a birthday for me! You are the most wonderful gift that keeps on giving, sweetie!
There aren’t many people I would choose to be my cousin and there are even fewer I’d choose to be my sister. Luckily, I didn’t have to choose between either with you as I was handed the 2 in 1!
We might have been each other’s biggest enemies at times as kids but as we’ve grown up, I’ve learnt to tolerate you much better! Happy birthday to you, sis!