Still being used

The redhead leads the two of you upstairs and as you pass through the house you can see the mess left behind from last night. Empty cups are thrown around the place, tables are laid out from beer pong games and there's even a bra hanging from a lamp shade. However, the house seems deserted with no one around other than this mysterious redhead before you.

As the three of you reach the top of the stairs you can start to hear a soft, repeated clapping sound coming from one of the rooms down the hall and you can guess its source. The redhead leads you to the room and opens the door to reveal some fat college kid clapping your girlfriend's cheeks. The two of them appear to be on a mattress that's laid down on the floor, and from your angle in the doorway you can't actually see Tracy, only the stranger's back. He turns his head over his shoulder to see the three of you and waves his hand as if to shoo you away.

"Can't you see I'm busy here Emma." He then looks past her to see you in the doorway, with Mia out of sight around the corner. "Oh hey man, the queue is there." He points over at another three guys leaning against the wall on their phones.

"Listen Jordan, this is the slut's boyfriend, it's time to finish up so he can take her home."

"No no, it's ok, let them each finish up one more time. In fact, Mia, why don't you get in there and help your sister out. I'm sure you can speed things up a bit."

Mia steps into the doorway ahead of you and you give her a slap on the ass, indicating for her to step inside. The three guys up against the wall drop their jaws as they see the almost identical twin of the slut they've been patiently waiting to use standing before them.

"Yes daddy." Mia lowers herself to her knees and crawls over to the three guys waiting by the wall.

"Emma is it? I guess we'll have to find something to do while we wait."

Emma bites her lip and pulls the door shut, sealing Mia and Tracy in with the four men, before grabbing you by the shirt and pushing you up against the wall. The two of you start passionately making out and you feel up her ass as you do so. She pulls her lips off yours and says "c'mon handsome, there's a room right in here" and then pulls you by the shirt into the room next door to the one Tracy and Mia are in.