I think this is an idealistic view that women can choose not to participate and opt out but often the pressure put on a woman to help with elder care and to host every Easter, Christmas, birthday or to host a Sunday dinner every week is subtle and insidious, especially if a woman is a SAHM, works part time, or earns less than her husband.
Hard disagree, it's not idealistic to say women can opt out of hosting wider family if they don't want to, I know plenty of women martyr themselves over family events etc, but not because of spousal pressure to 'perform' for the in laws, most of that comes from within themselves, bit of an old fashioned throwback to the times where men worked and women kept the house I suppose, but those times really don't exist anymore, ironically the only two stay at home wives/mothers in my immediate family NEVER host anyone for anything, I mean never, no one questions it or thinks less of them, they don't like doing it so they don't do it.. their husbands are free to host if they feel that is in any way unjust. It isn't about how much you earn or what you do, it should never be assumed that as a woman you are there to serve other people? If you accept and tolerate that within a relationship then more fool you.
But for the ones that are choosing to host wider family all the time for parties, Christmas, Easter and Sunday dinners every week, and choosing to martyr yourself and put pressure on yourself to perform then you will end up wondering if it is all worth it, if you ultimately enjoy doing it or enjoy the end result, absolutely fine. But if not, then why you are actually doing it? Some people will come to the realisation that they don't actually enjoy it that much, and it isn't worth the time they've wasted slogging away for little recognition, and there is an alternative, which is to stop volunteering yourself for all that graft, it's harder once a precedent has been set, but not impossible to remove yourself from a responsibility that should never have been yours to begin with.
OP is in a fortunate position here, there is no precedent, so there is no expectation of anything, if she doesn't want to host in laws every sunday or every religious holiday or at all in fact, she certainly doesn't have to volunteer for it, she is completely free to say no thank you, and set her own input levels and boundaries from the outset.. no 'discussion' required for that, no one can make her do something she doesn't want to do.
I personally think OP going NC with the in laws will make things incredibly awkward for her DH and DC to have a proper relationship with his parents and she shouldn't be putting that burden on him and their children, especially because she is doing it as a way of punishing the in laws for wanting to move closer.. (if you move near me I will never speak to you again etc) It is going to cause resentment between herself and her husband, and for what? She could just as easily choose the level of input she is comfortable with, set strong boundaries if that is what is bothering her, and just get on with her life, while letting in laws get on with theirs, her DH should be free to set his own level of input in relation to his parents without worrying about upsetting OP all the time.