Your sister, Yumi went to college one year ago. It was like heaven for you, she was a big bitch toward you. Always humiliating you with her boyfriend's but she 'was' gone until yesterday. She came back and she didn't change a bit, still has no respect for you and your space

Yumi:

"Ohhh little brother you can't believe how much it is over for you. The guys I saw in college you're in no match for them you will probably die a virgin with your limp cock"

You come out from the bath and see her sitting in your couch crossing her legs, exposing her pink thong but then she stumbled as your towel fell off

Yumi:

"W-What the fuck is that thing! N-No fucking way that's fucking enormous, gigantic... Nothing like I have seen before... C-Cover it you nerd why are you waiting?!"

she trips over you and stares at your cock from below with pure awe. Her nipples hardening and her creamy thighs rubbing together restlessly