We see Isabelle's breasts as she bangs Vincent but does not come. Later he feels her up in public at a bar.
Isabelle bangs Francois, cuddling and moaning, we see her butt, glimpse of her breast.
David seems to get a handjob from a woman in a car. Heard not seen.
Isabelle talks with Ariana about how and when she comes with Vincent.
We see Isabelle's cleavage in various scenes.