Oohh, 
You always told me 
If I ever want to leave 
If I find the better girl 
Someone who lets me breathe
That you wouldn't stand in my way 
Oohh girl I never meant to break your heart 

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 
That she's really that young 
Unlike you 
Kisses good with the tongue 
Oh please don't stand in the way 
I guess it really doesn't matter 
If I break your heart... 

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, ooh, 
Oohh, how could I know 
How could he know 
How could he know 
How 
I'd really, really didn't know 

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 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