Off the bat let me say I dont have DCs - this is an personal choice that I have often faced criticism for in the past, but I just think children require a commitment and sacrafice that my job and other responsibilities wont allow. I do love kids thou and have been babysitting for friends and family for over 20 years - I always like to help, as I can often see the toll of parenthood on my parent-friends faces.
With that in mind I am asking some advice; two of my siblings have had children recently and dont share my views and I feel are expecting an unreasonable amount of support and help from myself and our DM. Now DM has a number of health problems that have resulted in her giving up work (which she loved), but my siblings seem to see this as a free pass for on call childcare. And tbh I think she has tried to help as much as possible, doing full days and overnights when she can, but her health just wont hold up to it anymore (to the point breathing has become an issue putting her and DCs at risk). I have been trying to get in front of this and volunteer to do more when I can, and even pointing out that DM is not able for the amount of physical activity that goes into looking after young children. But with working full time and caring for both DM and other dependent family members who are disabled its a struggle - there are only so many hours in the day and they often go to DM when I am not available and guilt her into doing more. DM wants to be a part of her GCs lives, but it feels as if its an all or nothing situation - if she cant babysit there is no point as my siblings would not be getting rid of their children so they dont want that. This has resulted in a massive family fallout as according to them we should be willing to mind DCs when needed and to save money on child care while they are at work. It is worth noting I have taken time off work to mind DCs, done midnight medical runs, bought a mountain of clothes and toys for them - all on the understanding that I was helping until they got sorted in their new parenthood life, however this seems to have set a benchmark to meet and exceed going forward.
So my question is this - what would you consider reasonable in terms of family support? One sibling has pointed out that friends familys mind their GCs at least one overnight a week, however I think this is a family specific thing. I am happy to go to their house to mind DCs, but they want rid of them from the property. Also the ILs of both siblings are not forthcoming in offering help from their side so it is putting all the pressure on us. Know these discussions can get heated, but trying to put out a fire here before family disbands forever.