Two additional girls

Jade greeted you with a hug at the door and let you in, where you got a first look at the house they rented. It seemed normal enough at a glance, a large living room with crouch, loveseat, and leather chair facing a large tv, and off to the side was the kitchen and dining area. That’s where you noticed Rebecca talking to two other girls. They were allready playing a card game, but paused to greet you.

The two other girls were Amber and Monica, both hot babes in their own right. Then it dawns on you, if you know two are, well, packing heat, what if the other two are as well?

This is certainly implied after Rebecca asks you to sit next to her and explains the evening plans.