popping her cherry

need some advice my good friends younger sister wont's me to pop her cherry,she is hot,and she has already giving me head but do i cross that line and maybe lose a good friend.

Nooooooooooo....... your friend will seriously flip if he finds out you've tinkered with his sister!!

Don't risk it, man. I think getting head is crossing the line enough, but think about it if you were in his shoes.

"Oh, my 'friend' just screwed away my baby sister's innocence? Holy shit!"

It's not a good plan.