My DH has a complex family of half (3) and step siblings (3) via both parents who never married and were only together a few months. They all live in Australia, he left home at 18 and we live in the UK with our 2 DC.
Mil has just retired and has no money or assets. She lives in a really expensive city (rental prices comparable to London), she's just moved out of her 2 bed rental as she can't afford it now that she's no longer working. The plan was for her to move in with a friend for 6 months then rent a new place with SIL. ( SIL is a single parent, 1 primary school child, who works long shifts). Since SIL moved back to her home town (3/4 years ago) MIL has been covering childcare as SIL works 12 hour shifts, 3 days at a time and nights.
Bottom line is that SIL can't do her job without MIL's help. They have now decided that they can't live together as planned a year ago, as SIL needs to lead her own life and hopefully meet a partner (she was never together with her child's father, and he no longer lives in Oz).
SIL ( who hasn't been in touch with us for years), just asked if we could 'help' out with rent. She has no idea about our financial situation, we've just, as in this year, got ourselves in a decent position with no debt apart from mortgage and some savings. She said that she'd be fine with contributing to her mum's rent (average rent is $400/ week which is just about all of MIL's weekly pension).
DH told his mum that we can help her, but we're not going to waste money on rent. We can use savings to fund a deposit for a mortgage, but given the prices we can't afford the city. This leaves SIL without childcare and unable to do her job. It turns out that she has given the MIL $0 for taking care of her child over the last few years...
We've always paid for any help with our DC apart from the odd overnight stay where family stepped in, so I'm wondering how SIL thinks it's okay to effectively ask us to sort her childcare?