Ah, been a while since I've posted but this thread was something I couldn't resist (plus, computer is working again, yay!)
I'm in the same boat as the OP. My wife has decided she's not interested in this lifestyle, or at least not interested in pursuing it. She's open to it, if it happens naturally, but that's pretty rare.
Anyway, I want to do this and I want her to be a part of it. I can't force her into it and I'm not trying, but I get this sense of guilt when I want to and she doesn't. It's frustrating. So I get it.
I don't have any good advice to give other than "If she's truly letting you do this and you're not ignoring her, then stop worrying". If she's using it to trap you "I can't believe you went and had sex with another girl" then that's a problem. It sounds like it isn't. So stop worrying.
"Regret for the things we did can be tempered by time; it is the regret for the things we did not do that is inconsolable." - Sydney Smith
Kyle: 27 year old male
Katie (rymmare): 25 year old female
Kids: girl: 5 years old, boy: 3 years old