Hello kmsmi,
You are absolutely 1000% right. This denise sounds really horrible, controlling and someone who expects something for nothing.
Is it possible you could give her ticket to someone more worthy?
I really do not like the sound of this denise. Of course you should have your own bed. You are the one who is very ill, you should have it no questions asked. I bet denise is not going without heat and making all the sacrafices you are.
She is absilutely ruining the holiday. I would un invite her, give her ticket to someone else and ask them if they can pay half of what you paid for their share so that you could have heat and whatever else you need.
I feel so sorry for you. It sounds like you have one good friend and one selfish free loader of a friend.
I am so upset and angry on your behalf.
I hope you end up having a great holiday but best to uninvite her or she will riun something that is supposed to be really special