Speaking of dreams

Last night I had a dream that FH's younger brother got engaged! The only thing weird about it is that in the dream, they didn't tell anyone. What happened was that I found out on accident when she was telling him that after their (FH and my) wedding she would start to wear the ring. She didn't want to take anything away from us.

I've been thinking about it all day, because I heard through the grapevine of our mutual friends that he was supposidly looking for a ring. And now I have an itch to ask her! I don't know what to do...leave it as a dream? or ask them?