Can't get this fantasy out of my mind

I reconnected with an old friend I hadn't seen in 15 years recently. We'd kept in touch, but he just moved to the same area I'd moved to a few years ago. He's bi, or at least he was in college, and I'm pretty sure he had a thing for me back then, but I wasn't particularly interested. He's now married and fully invested in the suburban life.

We spent a Saturday on a road trip to take a look at a classic car he was thinking about buying. We had a great time, and had dinner and a couple beers at his house. After we said our goodbyes, I started to think back on the day and it occurred to me that he might have still been into me, and on top of that his wife might have been too. It was a few off handed comments, a couple jokes, but I've never been the most perceptive person.

At any rate, now I can't stop thinking about it. I'm not particularly into dudes, but thinking about him and his wife doing what they want to me gets me harder than I'd ever have thought it could. It might be all I can do to keep it together next time I see them.