DS has a lovely group of friends who we go to play with and have food with once a week after school. It Started as a pair of mums and our boys and is now a little group of 5 mums and kids. We have never excluded anyone and no other parents have asked to tag along in the past. At Christmas we went to the pantomime together and had a great time. On our way home another mum texted and was really upset we had excluded her and her son. Son is not someone who our kids ever mentions or seems to play with. She called us a horrible clique and said we should all go fuck ourselves! It was directed at a quiet mum who has been an aquintance of this girl in the past. Today said mum has texted me (no one else) to see if there are any plans for a play date after school and if she can join! Ordinarily I would absolutely say yes come along but AIBU to tell her to piss off given that she was really rude and particularly two faced! It's really awkward as If I don't reply or say no it adds to her feeling like we are a clique (furthest thing from what we actually are) but if I say yes come along I know I will feel really pissed off and two faced and struggle to speak to her. I would never want to exclude a little one from playing but can't help feeling thoroughly pissed off! suggestions for a first time poster???