Adult PC Game: A Couple's Duet of Love and Lust v1.7 by King B Archive

Overview:
This is the story of a young married couple moving into a new neighborhood after selling their home due to an unexpected financial crisis. In a new environment with new problems and encounters, the couple faces new challenges and opportunities that could redefine, transform or even threaten their relationship.
In this game, you make the decisions as both the male and female protagonists, affecting the plot in a realistic, organic, and complex manner. The storyline adapts according to the developing personality traits of the two main characters, and there are no clear-cut paths to many and different storylines you could follow.
You can challenge yourself to steer the couple towards a path that strengthens their love and overcome the challenges as either a conventional couple or a more adventurous one. Or you can choose to push them down the path of ruin and debauchery. It's all up to your decision, but reaching the end you want might not be as easy as you might expect.
Yes, ntr or any nonconventional relationships are avoidable.