[Yobieki Seisakusho] Itsuwari no Kakkou

The guy fucking her isn't the father, it's one of her father's employees and he's sterile. Her father just wanted the husband to discover the infidelity and divorced her. It's a bit retarded as a plot. Her father wanted her to marry a more suitable man, but who will marry a 304 that is divorced due to cheating?

From the little that I translated, as usual she became a slut for the father and enjoyed his dick better than her husband and the husband's father got her pregnant and it looks like the husband divorced her, but can't tell from the ending that she's single or with the father in law. At least the husband found out and didn't stay with a lying slut wife who would've made the husband think the baby was his. Refreshing change.

Now this is rare... the husband got her pregnant and divorced her. In the end, he dodged a bullet, she's a single mom, her dad thinks the secretary is the father and the secretary probably got ruined because of it. So, an extremely rare event in NTR: the cuck got the best ending!