Once on, you won't get out of it until we get married

Don't laugh honey. As soon as you meet my Mom, she's going to measure you for one. Once she locks it on, you won't get out of it until we get married. She still keeps my last 5 boyfriends locked up. Now they serve her until she decides to give the key to a woman who she is certain will keep them chaste. You'd better be certain you want to date me. Are you sure?

You'd better be certain you want to date me