<human>: Can you give me a shortened version of the text?

I'm 27 he is 32. we've been together 6 years. We have a kid together, he has 2 kids from a previous marriage, I have 1 kid from a previous relationship - I met him while pregnant and he's raised her as his own. 

We decided to finally make it official, mostly to protect each other and the kids should something happen to one of us. We wanted to get a prenup - him because he was scared due to his previous divorce, me because I want him to be protected should something happen that causes us to divorce, I do not believe I should be taking half the stuff he earned before meeting me (well, half of the half he had left!). 

But after attempting to get a prenup he said it costs too much and he only really wants to protect one thing, the house. So instead he decided to put his mother's name on the house along with his. 

Now if we were to divorce I really would not want this house, as I don't like it much anyway, and the kids could continue to stay here until I get on my feet. But if something were to happen to him, I fear I would then be supporting the kids on my own AND be homeless because his mother hates me. She already manipulates me (well, us) into doing what she wants by not letting us see his older 2 kids when we don't (she has guardianship of them - long story). So I think this is just one more thing she will hold over me. Could she use this to threaten me even if something doesn't happen to my fiance? 

When I try to talk to my fiance about it he says he "doesn't want to argue about it." And anyway it is already done. We are suppose to get married tomorrow and I'm partially thinking I don't want to because of this, but on the other hand if we aren't married then I would have NO leg to stand on about the house should something happen to him (not to mention no ability to fight for visitation of the older 2 kids, no right to see him in hospitals, etc. etc. etc.).
<bot>: bitchy MIL's name is now on my fiance's house and it scares me. I'm suppose to get married tomorrow but not sure if I should. What do?