Abby has had about 3 sleepovers at my mum and dad's house and one with my sister.

As for MIL, i felt really weird about the idea of her looking after bubby. It wasnt because i didnt think she could do it, it was more of an issue with me feeling that i didnt know her that well and being really weird and overprotective where MIL was concerned (ie taking bub off her any chance i got). I got over that by spending more time with her and now its really great. Abby gets looked after for a couple of hours about once a week and every now and then we all stay over. I wouldnt let her stay over night but the reason for that is she wont settle that well unless DF or I put her down (just when we are out and about that is, settles fine at home).

I just think that you need to ease into it and dont do it till you are ready and feel good about it. Even the first time Abby stayed with my mum i was in tears and called every 5 mins!!!