So my MIL wants to look after my DD and my BIL and SIL DS who are roughly the same age I've or take a few months. She is fantastic with them and loves them to pieces. When she expressed an interest in looking after the DC my DH and I realised that there is a part of her house that is potentially unsafe for children. The stairs come into living room and there's no bannister - fine if you're an adult but could be lethal if you're a child. Anyway MIL is in her early 60s and FIL died a couple of years back so there is no way we would ever ask her to shell out any money on adding a bannister. We briefly mentioned to her that it was a bit unsafe and she wholeheartedly agreed. We told her we'd pay for a bannister to be added and DH close friend is a joiner so he'd do it for un I expensively. MIL said to us to ask BIL and SIL as their child would also benefit from this safety feature being added. When we broached the subject with them they agreed that it was really needing done but refused to contribute. I'm not quite sure what to make of it. I'm happy to just pay so that it gets done for the DC and for peace of mind but can't help think that BIL and SIL are a bit tight.
AIBU?