My ex-mother in law is always honeyin and babyin everyone she meets. I think she's just a brown noser. I like her but because she's always so quick to hug people(even me and I know she can't stand me because I've caught her talking about me behind my back) I think she is a fake. Could be also this woman genuinly cares about you in a family sort of way. And the reason your probably uncomfortable to go out for coffee with her is you don't like that after all it is kind of intrusive to invade peoples personal space like that (I know I don't like to be hugged on by other people).I don't think anything is wrong with you not wanting to be close around her though.