You've always told me 
If I ever wanna live 
If I find a better girl 
Someone who lets me breathe 

That you wouldn't stand in my way 
Oh girl, I never meant to break your heart 

I, I promise you 
I didn't know, oh no 
She was your sister 
Sister 
What could I do 
She is so dope, oh yeah 
I couldn't resist her 
Your little sister 

And who would've thought 
She's really that young 
Unlike you, kisses good with her tongue 
Oh please don't stand in my way 
I guess it really doesn't matter if 
If I break your heart 

I, I promise you 
I didn't know, oh no 
She was your sister 
Sister 
What could I do 
She is so dope, oh yeah 
I couldn't resist her 
Your little sister

How, oh how could I know 
How could he know 
How could he know 
How 
I really, really didn't know 

I, I promise you 
I didn't know, oh no 
She was your sister 
Sister 
What could I do 
She is so dope, oh yeah 
I couldn't resist her 
Your little sister

I, I promise you 
I didn't know, oh no 
She was your sister 
Sister 
What could I do 
She is so dope, oh yeah 
I couldn't resist her 
Your little sister 

What? How old is she anyway? 
Sister...