They go with the guys.

So they all hop in Justin's car and drive off for Justin's place. Upon arriving there, they meet Eddy, Justin's brother, who is leaving for the afternoon. So they all go inside. Justin takes the girls' coats and hangs them in the closet. Then they all settle in the living room. Mimi picks the rocking chair, Isabelle chooses the smaller couch, and the guys share the bigger couch.
Justin then opens the TV and sets for the basketball channel. Isabelle, who really doesn't care about basketball, picks up a Sears magazine and starts looking through it. Didier, being at his bestfriend's place, feels like at home and picks up the phone and to call his girlfriend, he then walks into Justin's room for a little privacy. Justin then strikes up a conversation with Mimi. They talk about basketball and all, Justin explains the rules to Mimi and tries to convince her that the team playing is blue and not green.
Justin then lies down on the couch and Mimi throws him a cushion. He doesn't react, so she trows another one... He then takes it, and throws it back. Later on, when Didier comes back, he sits with Isabelle because Justin is taking up the whole couch.
Then Didier takes over the remote control and changes the channel from basketball to movie. Just as the women in the movie is giving the finger to the main actor, Didier turns to Mimi and asks: "Did you see that?"

Mimi: What? She just did this (Flings the finger to Didier)
Didier: Ya! On TV!!!
Justin: (Waking up) What happened?
Mimi: The lady on the TV just did this (Flings the finger to Justin)

Justin then picks up a cushion and starts gently hitting Mimi, being the girl she is, she retaliates and hits him back. Suprised by the retaliation, Justin backs off a little. But then comes charging with **** again, and Didier joins in on Justin's side. Outnumbered, Mimi can just curl up and wait for the guys to end the fight... For now. They finally stop, and everyone starts laughing.
After spending the afternoon laughing and hitting each other with cushions, the gang decides to go out for dinner. After dinner, the guys invite Mimi and Isabelle to a game of basketball...