Sadly i think it is most likely that Jade was a girl behaving badly. Watching them shortly before they went to the bedrooms they were both so far stoned out of their minds that what happened was I think ineveitable.
JP's reaction is as I would expect. It has always been quite clear from his body language that he does not realy fancy her.
Even when he was drunk last night and had a tongue swallowing session with her he pulled a face and said that tasted terrible and then would not let her kiss him again on the mouth.
