This post nails it OP, and @TigersAndToucs post earlier. I’m also sure they are both hard to read, much less dwell on and deeply think about what they are saying and what that means for you, your marriage and future.
im sorry you are suffering with endo and that sounds like it it is all encompassing you at the moment. I’m sorry, it’s unfair and especially with young kids. I bet this wasn’t how you thought life would be. You sound fed up and angry, very very angry and incredibly resentful. That sounds exhausting and a terrible way for you to be around your family, and children. But I wonder if it’s about the illness and everything happening to you rather than your husbands specific actions about a week in December?
You seem to have effectively made your DH your carer, whether he wants to or not and @MadMadaMim has made some really important points in a very thoughtful helpful post about developing independence which has to be a priority for you.
As opposed to others on this thread saying their DH wouldn’t do this, their relationships will be based on trust, love and respect. Partnerships. Your marriage is not that.
Your marriage is dead. Does your DH know that you came back to him solely so he would care for you? Is he accepting of that? It is not a way to live long term and fair to no one, not you, him, or especially your children if not what he wants.
Whilst he is on his holiday, maybe he can come back to you two being separated and use the time from now until then to arrange that. See what benefits you are entitled to, how will 50:50 work, have you applied for PIP? His family may well see that your marriage is dead and he is burning out from caring and being the breadwinner, so they are encouraging a break. It doesn’t sound like your family holiday was that for him. He deserves a break. And so do you, from the huge resentment of your life you are carrying. You need to change this up to be able to move forward. 💐