[MissKittyFantastico]

I think it was actually a game plan cooked up between herself and Isaac before she went in the house.

If you watch the video on the channel 4 website of the convo she and Isaac had just after he went in the house, they talked about how they were pretty much 'back together' just before she went in the house, but he didn't want to 'handcuff her' into a relationship when she was potentially going to be gone for months whilst in the BB house.

Isaac is a professional at these reality TV shows now, and I think he advised her to flirt with all the guys, even get it on with one of them to get the most air time possible, but to cock block the rest of them and also to talk about him (her 'ex') as much as possible, with the view to him going in to stir it all up later on in the series if he could persuade BB to put him in.

I honestly believe something along those lines has gone on. All a massive game plan on the part of Isaac and Noirin and in part, BB as well.