MIL budged in without knocking when I had clearly stated I was BF dd who is 5wks old. I was horrified but managed to remain calm.This behaviour has happened a few times over the years and rattles me beyond words. Dp thinks I'm overreacting. Mil and I don't get on that well but I try my level best to tolerate her as she loves dcs dearly though I know she dislikes me hence the feeling of invasion of pvt space when she does this. AIBU and WWY?