I think she saw that Dirk had changed and do good and that she doesn’t have to be afraid of commitment anymore. It wasn’t a big scary thing that was going to change Brad into a scuzzy.
Both spouses wearing a ring is a new thing. Back 75+ years and more only the wife use to wear a ring to mark that she was married and her husband not her father was responsible for her.
I think she saw that Dirk had changed and do good and that she doesn’t have to be afraid of commitment anymore. It wasn’t a big scary thing that was going to change Brad into a scuzzy.