SIL, her partner and my DN are coming to stay with us for up to a month as they are having work done on the house.
I am mainly ok with it, didn't really have much choice as she said they were having the bathroom done so I am thinking a week tops so originally said that was fine but it turns out there is a lot more being done so could take a lot longer.
We are really close so other than the fact it is bad timing and the fact I am mildly pissed off they booked the work in before asking it really is fine that they will be here. They have stayed for 3 weeks before and said they were happy to contribute £20 a week but she asked her cleaners to come round to mine instead of theirs as she had forgotten to cancel them then deducted the £40 to pay them off the £60 she was going to give me for the 3 weeks so I need to establish the 'rules'. My DH is no help as says just tell her what she needs to pay.
WIBU to ask for a contribution to the electric/gas etc as there will be an additional 3 people in the house and if it is reasonable how much would you ask for.