ex in florida selling home

My wife's ex put their previous home located in Florida up for sale with a rent to buy option. He and my wife's name are both on the title, but the final divorce decree gave sole use to her ex-husband with an understanding that when their daugh turned 18 that if the house was sold it would be split mutually.
If he sales the house through a rent to own deal does it still require my wife's signature to transfer the title deed and what are her legal options as far as her share of the sale price?

[HomeGuru]

She needs to sign the deed because she is still on title. There will be no deed to sign until the tenant excercises the option and there is a closing. Profit dictated by divorce decree or contract law.