Sorry to resurrect this but..
I keep thinking/worrying about a thread, and I wondered if anyone could help me identify it?
Basically OP had concerns about her BIL and her DD. She felt uncomfortable about BIL appearing to target DD for ' alone ' time which involved tickling games extra.
She asked her DH to make sure BIL wasn't left alone with with DD. As an aside, OP stated that BIL was good looking , had a good job etc but had always been single.
Things came to a head when OP left DD with DH and BIL one day, and came home to find BIL alone with half naked DD in the house, and DH in garden, thinking nothing was wrong. Apparently DD had an accident hence lack of clothing.
OP had started to get a really bad feeling about BIL, and that DH was enabling it, and that MIL also was a bit strange. Basically she wanted out of the whole family ( inc DH ), but then realised this would leave BIL, DH & MIL alone with her daughter even more with joint custody, access etc.
I thought it was a really sad dilema, and it kind of troubles me to think about it. I just wonder if it got sorted to the OP satisfaction.