Anonymous
Just do what I did when my brother who choked me came over. I whined and complained until my mother made him sit in the other room and I got the throne back.
reme_1
Then don't. Make other arrangements now before you feel backed in a corner.
Go out for dinner. How about sharing dinner with friends? Talk to your husband and make sure he supports you.
Nosehair
Presumably your husband is well aware that his step family is rude to you and ignore you. Tell him you will not be spending Thanksgiving with them. Tell him he is welcome to join you doing something else, anything else.
choko_canyon
Explain that to your husband, assuming he doesn't already know, and tell him that unless the situation is remedied, BY HIM, you will not be attending Thxgiving with his step family.
Anonymous
Then don't spend thanksgiving with them. Spend it with your family and friends. You have your own mind, use it.