I don't know why Atelier Sakura doesn't just invest heavily in localization, it really is beyond me. They have this huge catalog of games, some of which are very good and even those that aren't surely will receive at least SOME attention. Like it or not english is a more approachable language than japanese, a huge market would open up for them, for all popular japanese eroge companies in fact but especially those aiming at such niche fetishes, it would probably beat just releasing a game a year just for japan.
On a less rant-y note, a game named
Disorder just got posted and it appears to fit exactly here, swinging/hotwife/netorase without netorare. Nice art without cringy dialogue, there isn't much content yet unfortunately.