My honest opinion of the overheard/inadvertent cellphone call, even BEFORE I read the others' comments, was that you were overblowing it. UNDERSTANDABLY SO, considering your shared history with this main and the pain you've had to endure, but -- as a guy? -- . . .
My take was largely what the others' was: it's bullchit guy posturing. It's crass, but we can be crass sometimes, esp. when we think there are no women around.
I'm more concerned with why HE feels he's a "p*ssy" for doing the HONORABLE thing (fighting for his marriage), but what did he consider himself when he was wayward??? But even this is pretty typical. My wife was far more concerned with what people thought of her NOW THAT SHE WAS BACK AND FIGHTING FOR HER MARRIAGE AND BEING FAITHFUL TO HER HUSBAND, than she was when she was hooking up in dark parking lots in a beat-up old pickup truck with a man 20 years younger than her.