Lifts: bench 235 5x5, dead 405 1x8, don't squat. 6'1/190/too fat. We’re both 25. 5 years together and engaged.

Sex is often. She initiates a lot of the time. I'm half way through NMMNG and WISNIFG. Making large strides mentally. For the last ~2 months of implementing STFU/FOG/BR/DEER the relationship is recovering. We were both losing our minds for awhile there so it's been great.

Problem is that she may be cheating now. A couple months ago after we had a fight due to rambo instead of comfort, I walked in on her whispering to someone on her phone, "I'll call you back" and she hangs up. She immediately explained it was a co-worker that offered his number. I STFU waiting to see what she'd follow with. Then she puts me on full blast about the dude- tells me he's older (she has a fetish about older dudes), has kids, married but separated, is a lot more jacked than me, staring me down hard as fuck while saying all this. I kept it together and just said, "You have a good time with your friends sweetheart." and changed the subject to food. That was maybe the hardest shit/stare down I've ever experienced from her. She's usually easy. She rarely leaves the house outside of work and doesn’t stay out late, sleep anywhere else, or go to dinner with other guys, so many of the obvious signs aren’t there. Txting coworkers outside of work is somewhat normal as she’s very high paid and has an important role, but even she admitted this wasn’t work related.

Am I over-reacting? I feel like I am a bit but only in comparison to the obvious stuff I read here. My gut is telling me something is different this time and no matter how many times I try to let it go, so far it’s not working. Maybe this is my ego. I don’t want to be that dude more than I want to stop giving a fuck.

Update: Planned out financials and killed the puppy. This bond is gonna be hard to get over, but my gut agrees with everyone here. No pain no gain.