answer:The first thing that popped into my head (and it’s 1am, I’m exhausted and still can’t sleep and need to be up in four hours) was that they already have a history and aren’t keen on looking too friendly towards each other. My second thought was that, hey, maybe she’s a different color, ethnicity, nationality, or religion and that’s a problem for him. But she doesn’t seem to want to talk to him that much either, from what I gather from your writing, So, if she’s not worried about it and he’s not worried about it, it’s probably not your place to ask him, anyway. And that’s the best I can do with what little sleep I have.