When I'm putting lotion on and I've put the rings on a nearby table, that's her favorite time to swoop in and talk about the rings (ie ask to wear them for a moment) I always tell her that it's the "daddy loves mommy ring" that he gave me when we decided we were going to be a family forever.
(NOTICE: I'm actually wearing two wedding bands. The smaller yellow gold one was my Nanny's. She gave it to me along with her original engagement ring when I was in college. I wear her wedding ring more often than I wear my actual engagement ring. I love it. It definitely makes me feel like she's close.)