Exactly this ^!!
Do some of you ignorant, rude posters just not bloody read the thread? What part of the OP IS SUPPORTING HER DYING BROTHER AND HIS 3 CHILDREN didn't you get???
Even in the light of the OP posting this, the vitriolic comments keep on coming?! What is wrong with some of you people?!
@Moonphantom please don't take the nasty comments to heart; in fact, just ignore them. Of course you want to spend time with your DD before she goes off to uni. You are doing the best you can to support your MIL clearly. You have the worry of and support for your brother and his family - whatever some idiots here say, your MIL doesn't trump that!! You are stretched to the limit, it's clear. You've also been bereaved of your FIL, and supporting your DH and DD following it. It's really not a big ask to have a relaxed Sunday.
You need to practice some self care or you will burn out altogether. Definitely lay down some ground rules about how it will be when your MIL is in your home. She can't expect a roast dinner every time - it's about the company not the food. It's perfectly acceptable to offer her something easier and cheaper, and she isn't paying for it, so should be grateful! Don't let her presence prevent your Sundays being relaxing - and why does there need to be pudding and wine? If she wants those, let her bring them.
I'm so sorry about your brother - that's such a tough situation. I wish people here had some empathy but all too many don't. Talk about kicking someone when they're down.
Look after yourself and as I said, ignore the nasties xx