Haven't posted here in a while, just wanted to drop by with a few recommendations.
1. Atelier Sakura - Gyaruzuma Sex - Hoka no Otoko ni Inwai Houshi Suru Ai Suru Tsuma (ギャル妻セックス - 他の男に淫猥奉仕する愛する妻),
VNDB v26397
This is very strictly a happy netorase game with an extremely simple, predictible plot. I don't think it'll appeal to most people in this thread (it might be considered outright boring), but I loved the characters. Played this game carefully since I enjoyed the dialogue exchanges between the husband and wife. The wife is top tier.
Summary: Wife has a sexual history, husband doesn't, and she's lent out periodically to someone they know.
I'm not exactly much of a veteran to playing NTR VNs in the 1st place, and have been on hiatus for the majority of the last calendar year, but I don't recall any other major attempt at this story by a major publisher other than ANIM's
Boku ni Dakare Aegu Tsuma..., which I outright disliked.
2. GapTax's
The Great Thunder-Steel Raiouger
Straight forward RPG Maker corruption game that has a fan translation (from f95zone IIRC). I'm sure it must have been brought up before in this forum, but it's just a fun little romp where you can switch perspectives between the male and female.
You walk around, check scenes or thoughts, and engage in dungeonesque battles. Male POV isn't actually great for mystery; it's used to check corruption stats and expose to the player other males' inner thoughts. Simple but I found it fun.
If you can afford it, buy the game at regular price or discount. There's a torrent of the English version out there to trial it. Just remember to check the menu constantly for partner reactions when exploring dungeons!