I think the reason she's doing it here, though, is to try and get a reaction - any reaction - out of Bruce. I mean, look at him - he's just sitting there like a dark, brooding lump. The man is NOT good at keeping up relationships - she's not being rude so much as mischievous. 'Well, if YOU'RE not going to do anything, I'll just come and have some of your food, then! Ooh, what a nice big piece of turkey this is! Do you want it? Hello? All righty, then - down the hatch!' One imagines that after about thirty seconds of this, he sort of growled and said 'Selina - are you trying to tell me something?'