I might not be able to hand you a gift in person this year, my dear sister, but I can still send you some heartfelt birthday wishes from my heart to yours.
Happy birthday to my funny and intelligent little sister! You’re so witty and you never fail to make me laugh - you’ve clearly learned from the best, sis!
I hope your special day is full of wonderful moments and lovely surprises!
Happy birthday to my younger sister who a lot of people think is actually my elder sister!
I’m sure it’s only because you’re so wise and mature that people think you’re older than me anyway, sis! Either that or I just seem super young and immature!