Very suspicious I thought. In last night's show when Rex, quite understandably reached the end of his rope and began acting out, having another dig at Bex's size by saying 'you really need more food' (or something similar) to her to which she looked suitably angry...
... a little time later she's sitting in the ashtray with him saying she wants to start again with him, and not looking for revenge... I think she's starting to see that Jen's group are not surviving when up for eviction and Jen may go, thus she's gonna have to have friends in the other camp! Sly little ....