Ok deep breaths op.💐 Your poor sister. It’s really terrible that this has happened but you are taking on board all of the worry about her pain, her dc, her dh, your parents’ reaction all at once, as though it is solely your responsibility.
Obviously you may have a key role to play coordinating help, and doing stints yourself, but it might be less panic -inducing to break this situation down in to small steps so it isn’t so overwhelming.
First of all, lthe doctors and nurses will do their jobs and your sister’s pain will settle once they get her leg stabilised, straightened and pinned if necessary. The painkillers they use may ensure that she doesn’t remember a lot of the worst bits so try not to worry too much about that.
Your sister might have access to a school WhatsApp group and I am sure other parents who live nearby might volunteer to bring the dc back and forth to childminder and school with their own dc, once they know about your sister’s situation and then you and your
DM can maybe take turns in the evenings baby-sitting, helping out generally, or by making freezer food.
There are lots of disability aids that can be hired now to help you if you are in a wheelchair or on crutches for a while. I broke my ankle once and found a wheelchair was the best way to look after a small child when on my own.
Finally, your sister’s mh may take a turn for the worse, as it’s a big blow, but you don’t know that for sure yet, and you can encourage her to get mh support if that is a possibility, so try not to panic in advance about things that may not happen 💐
The best thing you can do tonight, once your diss is settled on a ward, and the dc are taken care of, is to take yourself home and have a strong cup of tea and an early night if you can, and try not to take all of the worry on to yourself, as your dsis’s dh is there to do a large part, even if he does so unwillingly! And try and approach things as they come up rather than worry too much in advance. I know this is easier said than done but try and relax a bit tonight if you can.
Good luck op. Your are a good sister and your dsis is lucky to have you batting for her! But try not to take on all of the worry too 💐