Thank you to everyone who's been supportive. Also thanks to those of you who were worried, but managed to say it in a nice way.
I'd been experiencing a lot of mixed feelings since my last post.
Long story short: Jen had replaced me sexually with Jason. Jason didn't officially move in, but he was spending every night at our apartment. It was exciting! But, it also had a lot of downsides for me. More and more, I felt excluded. To Jason, being exclusive sexually with Jen meant that I shouldn't even be allowed to touch Jen sexually or to even see Jen naked. Showing too much affection wasn't acceptable either. Jason would tell Jen and then Jen would tell me. Not that she needed to. I could tell that Jason didn't like the fact that Jen was married to me. I was getting fed up. I let Jen know. It turned out that Jen felt the same way. She even told me that Jason had started talking about introducing themselves as a couple to each other's close friends and relatives. Which Jen didn't want. Jen and I agreed that Jason was probably looking to replace me entirely and not just as Jen's lover. Jen broke things off with Jason this past weekend. Just in time to start the new college semester with a clean slate. Jen and I made love on Sunday evening. It was just vanilla sex. There was no talk of cuckolding and we both seemed fine with that. Then on Monday is was back to school. I noticed that day that Jen had put her wedding ring back on.
We made love again that evening.
Anyways, I don't know what's going to happen next. But, cuckolding isn't something that I'm thinking about at the moment. All I can feel is relief and happiness that I still have my wife.