Chapter 4: nighttime fun
Ben floated on top of Gwen as he admired how vulnerable she looked, she was wearing her pajamas and had a couple of buttons undone, Ben decided to play with her a bit before the main event.
first he gently lowered her pants so as not to wake her, thus revealing her huge butt, then slowly unbuttoning her shirt one by one until exposing her boobs, that excited Ben too much, so he immediately pulled out his tentacles and began to rub his body. gwen delicately so as not to wake her up.
one of her tentacles began to rub on Gwen's pussy, causing her to start to get wet, then Ben began to slowly enter her body.
Gwen quickly got up from her bed, "hello again, sorry for interrupting your sleep, but i plan to borrow your body tonight" but before starting to play with her, he decided to look through his things, and was very surprised to see a dildo from Huge size and a bottle of lube, Ben was stunned, it was amazing that this fit inside her, but if she had already used it then there was nothing to worry about. "I can't believe you have something like this hidden in your room, I think the night just got a lot more interesting, don't you think so Gwen?".
Ben used some lubricant and decided to start the fun, he fixed the dildo to the floor and then he was forcing his cousin's body to sit on it little by little.
"Ahhh~" the sensation was wonderful, he could feel how little by little the huge object would have passed inside his interior, every time he massaged his interior it was wonderful, but Ben knew that his cousin could do more than that, so he began to ramming Gwen's ass hard and fast against the dildo, "Ahhh..., I knew you could do it little bitch~"
Ben forced his cousin's body to violently ram his ass against that huge dildo, so hard that seen from the outside it seemed as if her pussy were completely devouring him, then Gwen's body climaxed and she collapsed on the floor, however Ben was still inside his body, Ben said "that was amazing ~ ... but I want more."
Ben continued to wildly jerk off his cousin's body for a couple of hours, not realizing that the time for de-transformation was long past.
When dawn came Ben finally decided to leave his cousin's body, but not before putting her clothes back on and leaving her on her bed, then he went to his bunk, pressed the omnitrix and de-transformed, falling tired on his bed after all night of fun.
Ben did all of this in an almost intuitive way, what he didn't know is that due to the problems they had with Ghostfreak the master control had been unlocked.
End of Chapter 4