My MIL can't go a day without a drink and by drink I mean every evening a bottle if not more of wine. She can't weigh more than 8 stone so the effect this has is dramatic. She is also a bit of a flapper and in any kind of situation no matter how minor, she gets flustered and in utterly useless. My problem is that she keeps asking to have my 3 yo daughter to stay over. My SIL has allowed her kids stay and I have been talking to my MIL on these occasions on the phone and it has been obvious that she has been drinking even while minding the kids (slurred speech). I find this horrendous and would never drink when minding someone elses kids and certainly never drink to excess when my own kids are at home. I am running out of excuses and my other half is well aware of the situation but kind of shrugs it off and says let her stay and says he will tell MIL to lay off the juice but I don't think that is a good compromise.