Now, that's an interesting find. I don't he used that ring to pretend he was married to the ow. Maybe he won it gambling? Something isn't right about it...I think I would take a photo of it and put it back, if you don't, he'll know you know where he stashes stuff.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.