Thank you so much for the replies.
A few points that I would like to clarify.
This is an annual ski trip, always funded by MIL. In my opinion, she controls her adult children (all in their 30s )with her money. My DH is the only one of her kids with his own children.
I believe MIL does not like me and is incredibly jealous of me, and I suspect has deliberately excluded me or interfered in my relationship on several occasions, but I do not have proof. For example, if I would enter her house or her mine, she would not acknowledge or greet me (even when pregnant with her second granddaughter - she's obsessed with the kids). DH confronted her about this last year, and she denied it all, cried and told him how much she missed him (he is her eldest). She excluded me from the invitation for the annual ski trip two years ago, when my eldest daughter was 1 3/4 years. None of us were invited at all last year, because I was expecting and my eldest was too young still.
I genuinely believe she has ASD tendencies, but this is a private opinion. However, I have seen her manipulative behaviour with others at work, with her openly disliking her brother's wife - and suggesting activies that are too costly in the hope that her sister-in-law won't participate (DH told me this, and that she wa laughing about it).
I have skied before (but not in Europe), thoroughly enjoyed it and would like to have the chance again. But I don't come from a "skiing family," if that makes sense.
At the time of this upcoming trip (December 2024), our daughters will be 3 and 3/4 and 18 months, respectively. The trip is to Bad HofGastein (if anyone knows anything about this place).
DH and I had an enormous row about it all and at the time he said his decision on this was purely from a value perspective - less bang for our buck if we had to purchase two adult ski passes ( the travel agent only does weekly ones, however, i since found out we could get daily passes on site). SUbsequently things have calmed, and he has admitted he has felt enormous pressure from him mother to commit to something, but with some much stress on his plate (work and life with 2 small babies) he just wanted to make a quick decision, to get it off his plate.
DH's own father has never joined one ski trip - he hates skiing, so just doesn't go. So in a way, this type of "family separation" is totally normal to them. but at no point did I express that I had no interest in skiing - so I wasn't eve considered in the decision making. it's not normal to me and my values
Personally, I believe DH is the problem - he misses his family, and has missed out on the ski trip for 3 years now (and whether he realises it or not, he blames me and my daughters for this), and fears his mother (which he has openly admitted to me previously).
Anyway, things have cooled down now - he has admitted what an error of judgement it was to even suggest it. and is now looking at ways for us all to go, or none. But I am still extremely hurt that it had to errupt into an enormous row (so draining and devastating) to get to this point, and it speaks to much bigger issues between us. He has agreed for us to sit down with a couples counsellor next week.