Nothing wrong about not wanting to be around people you don't like. We all should choose the company we enjoy, not just go to some place where someone mistreats you. That's emotionally damaging. Try to either talk to your husband about it, so he doesn't get angry, just explain it's not that you don't like his family, it's just that you are too different from them and don't have any common topics to discuss and feel awkward there. If you have a good relationship with your husband I'm sure he'll understand it. Telling him you got sick will work a couple of times too, but in the end you have to have an honest conversation about it anyways. If you explain everything in a diplomatic manner I believe it shouldn't bring about any problems