Ex wife wants to be removed from our mortgage. Do I need to refi?

My wife had an affair, refused to go to therapy, divorced me and moved out. I've been living in our marital home trying to give our kids some splinter of stability through all of this.

My ex wants me to buy her out of the house. I have that option according to our divorce decree.

Do I need to refi on the house? We have an attractive rate and I would prefer not to. Is there an alternative option to remove her name from the mortgage and associated key paperwork?

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