Why do I have to sign a closure document on a house my soon to be ex wife is purchasing.

Will be divorved permanently in a couple weeks. We have been estranged for 10 yrs and just never fiked for divorce. Dumb on our parts I know. But now we have filed and I have taken a paternity test to prove her son is not mine. Which he is not. She is either purchasing a home or refinancing a home and im being told in order for her to close I have to acknowledge the loan and closing documents since we are still technically married. I was told by her lawyer and loan offucer that I have nothing to do with the loan and im signing a dower document also. But now they want me to sign off and agree on the final closing details??? Why, if I am not a borrower on the loan? This is in Ohio btw.