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!
If today was Valentine's Day I’d be asking if you’d be mine, but as it’s your birthday and your special day to receive all the wonderful gifts to your heart’s content, just know that I’m yours.