Ura Dungeon Okusan - Ch. 2 - There Are No Stairs!!

[GranEschaton]

Damn... I got blindsided.

I was accustomed to the stories being made of the male MC getting NTR'd, especially after Isekai Furin 1 and 2.

But I failed to realize, the MC here is the wife. And while she was too loyal and too powerful to be stolen away. Her hubby though... This could still become an NTR manga.

I'll add pg 3 and 5 also had minor NTR vibes, but like you said the real threat will be keeping the other muscle mommies away from his SSS Housework, SSS carpentry, and SSS night skills