@kronix I bet his wife is also a summoned beast and that's why she keeps disappearing all the time
Or maybe since he now has 6x courage he can actually confront her (since he said he was too scared before).
That said, it's a weird way to begin an isekai "I've been married for 3 months and my wife won't let me fuck her and Oh look at that, I'm in another world!"
As far as cheating in Japan, people definitely cheat more there compared to other places, and I think that's because of how much time husbands and wives spend apart. But it's not like rampant cheating doesn't exist elsewhere, like in the U.S.
A company that does paternity testing said they've determined that approximately 10-20% of American men are unknowingly raising children they didn't father.