Brief background - have been friends with this woman since DD started school, something happened (dont ask me what) and she has pretty much blanked me since before easter. I actually asked her if I had upset her (was brushed off with - oh no, ive been busy) fine. Time to move on (i did post a whole thread about this before if anyone can be arsed to look) Based on advice on here, just sucked it up, moved on, tried to encourage DD with new friendships.
Something happened at school, other parents complained about her DD and forbid their children to play wiht her - basically the shit hit the fan. This woman reacted badly (i imagine she was v upset to be fair). This had nothign to do with me, but both other women told me about it - I had had issues with the child before but had let it go as it seemed to have blown over.
During the easter break my mother was taken ill and we have had a very worrying time. I had told this person about this and not once did she ask how she was etc. Even when i spoke to her in the playground one day.
But now she wants to be my friend again - now im getting texts askin me for coffee, she texted to ask how my mother is (im so going to out myself here
. So she has gone from pretty much blatantly blanking me and upsetting my DD. To wanting to be my friend (So she can slag off other parents, re-establish friendship between the DDs).
The grown up in me just thinks - just kindly tell her you would rather not be involved in the playground hoo ha, but that I wont be forbidding my DD to play with hers in the playground, whilst not actively encouraging the friendship. Engage in small talk and leave it at that, which is going to open the door to play date invitations when there was one that was retracted before easater that upset my DD 
What i really want to do is say "look, you blanked me for ages, upset my DD and made it perfectly clear you didnt want a friendship, so now the shit has hit the fan you want to try and wheedle information out of me that i dont have anyway and try and get my DD to play with your DD again because she now has no one to play with, so please do me a favour and fuck the fuck off"
What i WILL do is just try and avoid avoid but it does annoy the hell out of me, she has just texted asking after my mother - like she gives a flying fuck 