That One Time

I've been married to Karen for five years now. We met in college and have pretty much lived together ever since. Things were good at first, then gradually grew distant... until last week when she suggested we role-play an old scenario from our past that I thought was a one-time thing back then. It felt so out of character for us right now, but it kinda worked like magic once we got into it. But afterward, every time I think about it, there's this knot in my stomach wondering if it means something or nothing at all...