Lingua Franca

It started in a bar in the south of France with my girlfriend, Anita. A few drinks and some new friendships being made, accompanied by the fresh ambience of a new place. I understand a lot of French but not everything so I was doing my best to keep up. Some hours later we've all moved to our hotel room for an apres and one by one people leave until it's just me, Anita and a very handsome man called Gaston. As I closed the hotel door and returned to them, I tried to catch back up with the conversation but was struggling to figure it out. Suddenly they both looked at me and Anita says "Est-ce que cela te va?". I assume it's something simple like another drink, so say of course and she replies, "ok alors, à genoux". My knees? Now I know the night has switched, and I know what she meant. Then she turns to Gaston and says the same, she unzips her dress and lets it fall, standing Infront of the two of us before turning and lying on the bed. "j'ai besoin d'un massage et j'ai besoin de quatre mains". I understand massage so I edge forward with Gaston and we both start to work the muscles of her body. As we go Anita is really beginning to enjoy it and it's clear a massage isn't all she needs. She flips over and says more French I don't understand, but Gaston jumps into action, I don't know what I was told to do but I can't wait to find out ...