Well surprisingly the guy does in fact cheat but not with a girl, the black hair guy instead PartyBear
Wow. Of course he did, huh? I though it was only the wife cause I just skimmed through it. He liked getting pegged, what happens if he faces the real thing? Of course he's gonna jump at the chance
Something similar to this
https://loveheaven.net/manga-kochira-kara-iremashou-ka-sono-are-wo-raw.html