He mentioned a few weeks ago that he might begin to take the kids every weekend. I think he is thinking that if he takes them more, he can reduce the child support. He also told me that he would get back to me, but he hasn't said anything yet. STBX works a job where he has to work every other weekend, so I think he is either trying to get another job or he is trying to lower the child support. I definitely do not think it's because he wants to spend more time with his kids.
I don't ask them much about what they do when they are there, they tell me whatever is important to them. Sometimes they complain that all he does is sleep and leave them to play with their other cousins. I have the usual complaints when they are there--they eat junk when they are there, no regular bedtime, and many times when they are there for more than the 2 weekend days, no one gives them a shower. My kiddies are 5 and 8 and to have your kids come back home on Monday night wearing the same underwear that you put them in after their bath on Thursday makes my skin crawl.
So to answer the question about my MIL, I guess she is ok, but if no one is bathing the kids, I think I have reason to be concerned.