Long story short. Sil is coming with her 2 children to stay with us whilst she finds somewhere to live near us so we can support her and the kids. She has a drug habit mostly weed I think and I was trying to lay out some ground rules with him one of them being no drugs in the house while she is here - which will hopefully be no more than a month. Dh thinks it's unreasonable to expect this and she can't just go cold turkey. She has lots of mental health problems and currently lives with Mil who basically looks after the kids as she stays in bed all day and only gets up when she can be bothered and goes out to the shed to smoke weed. Anyway aibu?