Had a mammoth post typed out with the whole story but essentially want to know how would you deal with this situation...
Negative and critical DM ... lots of health, mental health and probably ASD issues - which as much as I'd like to be supportive, I find really triggering being brought up her being this way and other compounding factors from traumatic childhood. Have gotten to a situation where for the past 6-9 months have contact but keep her at arms length. Don't engage with any conversations where she has the opportunity to say anything that will get to me. Though this is emotionally tiring in itself keeping up the facade (visits are several days due to distance every couple of months) but manageable.
Now she's offering a treat day out on her for a special occasion, just the 2 of us. frankly I'd rather chew my own arm off than do this... but I don't know how to get out of it without telling her everything. Which I'd decided not to do again as its a whole drama in which she is the victim. She also kindly offering help "with the kids or house" meaning I think your life is a total mess and you need me to sort it out. I'm quite happy with my kids and house thank you and I don't require help. I mean help is always nice but not when it comes with all the judgement!
Any advice/perspective welcome.