Have sex with him

You look at him as your eyes lock with his before you both move your face at each other's direction, leading to a long passionate kiss. You stand up and sit yourself on his crotch (where you could already feel his erection through his pants). After you make out a bit you take off your pullover again, while he puts away his T-shirt too. You see him looking at your tits constantly. "Do you like them?" You ask while shaking them a bit. He just nods. You grab behind your back to open your bra, letting your breast hang free. Taking one of Dave's hands and leading it to your big breast you feel how he starts massaging them, which causes you to moan slightly. "Wow, they look and feel so nice" is all he could say. You stand up and pull down your panties, putting on quite a show for him. You look down, it was your first time seeing your sister's pussy too. It was nicely shaven and her ass looked great too. You go up to Dave and unzip his pants, letting his dick pop out. You place yourself above his crotch again before inserting his cock into your dripping pussy. You scream in pleasure as you start going up and down on his boner. Feeling your big breast on your chest, you grab them and start to massage them. Hearing your sister moan in pleasure made you even hornier and soon enough you hear Dave shout "I'm about to cum" you look at him "Yes, do it ... don't pull out!" You say to him before giving him one last kiss, then you feel his dick pulsing. You feel how he starts shooting his hot semen into your young pussy. "Yes Dave .... fill me up with your sperm ... oh, you're so hot... i love you so much" you shout as the pleasure of the creampie drives you over the edge too and you experience your first female orgasm.

You then give him one last kiss before you lay next to him, enjoying the afterglow. "That was amazing" was all you could say. "I'm glad you liked it too" Dave responded.