Thanks for the translation.
I think what will happen in the end is that he'll defeat the demon god, charm the goddess and be sent back to his original world, but he'll be sent back to his wife at a time before the accident...so when he walked in on his wife cheating it was actually him banging her. After finishing off his wife, he'll be holding her thinking about all the adventures his past self is going to go through when suddenly a portal opens and the married women jump out since the charm effect is JUST that strong. Maybe holding babies.