I'm desperately trying to keep up with this thread!
Basking - so sorry to hear what you went through. xx
Cailin -
at your DS. How lovely.
NHAN - The MIL situation sounds awful. Best thing I ever did was divorce my ex and thankfully he sees the kids rarely (MH problems). I don't take them to see his parents. They were outwardly respectable but inwardly his Father is the most toxic and controlling man I have ever had the misfortune to meet.
Thinking about other posts on here, I agree it can stir up emotions and bring back memories. It certainly has for me. And anger. Sometimes I have to just not read it or step away for a while.
Can't remember who said it but I also promote the "you can tell me anything" approach with my children. Especially my daughter.
As for trusting other people with my children, I've said this before so forgive me, I do find it hard to let my daughter have sleepovers but I do allow it. I fret though. One long and unexpected play-date at her friends house the other month ended up with her sleeping over (with my consent).
It was so lovely to see her the next day, but I had to do the light hearted questioning thing "so, where did you sleep?". "Oh, you topped and tiled with . I bet that was fun!". "Was there anyone else there?". Aaaaaarrrrgh. Perfectly innocent questions but my thoughts were "has anyone touched my child"!.
I won't have any children stay overnight here. But then again, I'm a single mum of 3 so I very much doubt anyone would expect me to 
So sorry as well at the lack of support shown by DP/H's. I hinted VERY heavily to my ex-h what had happened to me in my childhood but he ignored it every time.