You make her like it, and she cums.

You kneel on the picnic blanket behind Jessie while she kisses her sister passionately. You reach around to squeeze her little titties, and thrust your hard, thick cock up her pussy. Your girlfriend's hot little sister takes your shaft deep, and moans as you fuck her. "Oooh, fuck! Oh yes! Oh, fuck, yes!" Jessie moans..

Jenna breaks her sister's kis, and kisses you over Jessie's shoulder. "Ooh, yeah baby, fuck my sister. Fuck that little pussy hard." You reach around Jenna, and grip her ass, pounding Jessie's pussy even harder.

Then Jessie throws her head back, arching her back over your shoulder, her long soft hair falling down your back. You feel her pussy constrict around your cock, flooding with her wet, juicy, teen orgasm. She moans and writhes and bucks, cumming hard. It's so good, you cum too, hard, bursting inside her, filling her hot sweet pussy with your seed. Jessie twists around, kissing you, sweaty, panting, and slowly slides off you. Your girlfriend looks so turned on, staring at her sister's pussy dripping with your cum.

(Mark +1 xp when you make her cum)
(When you mark 5 xp, gain a new character move)