Really messy divorce situation. SIL doesn't have the dc apart from when she feels like it which is once in a blue moon. She says she'll have them every other weekend if my BIL gives her £200. She contributes nothing financially whilst my BIL pays for everything they need including childcare while he works. This is also the woman who when she does have the dcs, sends them back without their shoes and coats which she sells. I am beyond fuming that she can make these demands. It is pushing my BIL over the edge.