We ALL have dreams like that- really. It's subconscious, and is not something you have control over. Don't feel guilty- they'll stop. They won't interfere w/ your relationship unless you let them.
You know when you try not to think about something, and it's all you can think about? Sometimes dreams are the same way- you try so hard not to have the same dream, that you end up having it more! Just relax- (maybe even enjoy it a little!)- they'll end.
If you're still worried about it, why not turn your erotic fantasies with Vin into a reality w/ your husband- that's the best kind of interference!