On Saturday LO went to MIL's house for the day, which we were very greatful for as it gave us a chance to do a lot around the house. However when she got back she was pretty naughty and this carried on on Sunday. Lots more throwing of stuff (including food), tantrums and finding herself funny for behaviour she would normally know isn't acceptable. We have been having issues with sleeping anyway, but yesterday was horrible with LO refusing to settle and becoming violent at both nap time and bed time. OH finally got her settled for sleep at almost midnight. When we've been round at MIL's with LO, she seems to laugh at most things that LO does. Example, if LO throws a toy MIL pretends to copy her in a dramatic funny way and laugh and make it a big fun deal. Generally MIL makes everything hyper and exciting and OTT, whilst at the same time ignoring or laughing at unacceptable behaviuor. I'm gettin very worried as MIL is meant to be looking after LO when I'm in labour and it would be very unfair on LO if she has to be told off on the first day her baby brother is at home because her behaviuor is as bad as it has been yesterday. Does anyone else find thier little angels return as little monsters from visiting certain people?