You fuck Jenna's ass, make her like it, and she cums.

Jessie spreads ger sister's ass apart with her hands, and you ram your huge cock deep in your girlfriend's hot, tight asshole. Jenna screams as you hard-fuck her tender asshole, still kissing her little sister.

"No! No! Please stop!" Jenna yells, "Not in my ass!" You keep pumping your cock in Jenna's hot ass, and her screams of pain and protest turn to moans and cries of pleasure. "Ohhh," your girlfriend moans, "Oh god ... you're so big ... I can't take it ... you're making me ... cuummm!"

Jenna cums hard, convulsing, her already tight asshole constricting your cock like a vise, sucking your cum in a hard, hot rush from your balls deep into her guts. She lets out a long, low, helpless animal moan of pleasure.

Jessie kisses you deeper, her teenaged tonuge wet in your mouth, her hands all over you.

(Mark +1 xp for making Jenna cum)
(When you mark 5 xp, gain a new character move)