Changed name .
So MIL is pleasant enough, a bit bossy at times, but we haven't had any big issues. We have a wedding abroad this year and my DH wanted to bring MIL to babysit whilst we were at wedding. It was going to be a quick visit but it turns out I will now be able to get time off work so could stay longer.
DH wanted to stay on in the area for a bit of a holiday. When he made it clear it was with MIL, I said no, a holiday for that length of time wasn't doable. DH thought it would be nice to spend time there so MIL can spend time with our child and her family is from the area and mentioned it to her before clarifying the situation with me. Seemed she was excited about it, which makes me feel a bit bad to say no.
But I put myself out of the way previously and the situation ended up being far too much for all of us, so refusing to repeat my mistake.