My Dsis is going through a very messy break up. Her H was/is to all intents a complete bastard and she's well rid of him.
However, now that she is a single mum she is counting a lot on me and our mum for emotional help and childcare (she has 1 dd). We are trying our best to help out especially DM, but I have been starting to notice that DM is exhausted after looking after her granddaughter and even though she is a fit and active woman she is also in her 70s and several hours with a very demanding 4 yr old is a lot to handle at the best of times. I try to help out too but I have my 3 yr old to look after and work commitments (although I am freelance) and I just can't offer as much as I wish I could.
I feel guilty that I can't help as much but in a way if wish my Dsis could see that we are doing what we can but there has to be a time when she finds some other means of childcare because it's just too much.
Is my opinion unreasonable?