Sell that ring and run. Man have no need to get married anymore for any reason . The institution holds exactly 0 upside or benefits for a man.
Here’s a thought...maybe that ring was an heirloom....like it belonged to his Grandma.
Selling it would NOT be a good thing. Take it back, throw that beotch out on her plump ass, and find a caring and GRATEFUL woman to give it to.