You know where this is headed (or could head).. This is not mind reading the dev, just seeing how the game has gone so far.. Stefany does things befoire she has approval "because she knows the husband will agree after the fact" or if he falters she has sex with the husband until he agrees to whatever she wants.
Basically she's stepped into the driver role and is moving things how she wants it, which is pretty much she has sex with whoever she wants, and then gets permission. Not a far cry from the next step, traditional in games where the female is a MC (or the real MC in this case here), which is her doing things at the spa, or the kids house, or somewhere else and not really saying all she did, or any of what she did. She's already proven she's past wanting her husband for sex when she comes home from the boss party and the first thing she does is have sex with another man. Oliver is already out of this story, other than being a beta cuck, which is unfortunate. When the woman prefers sex with someone else over you, you're done.
We'll see but not impressed so far with what started as a true equal exploration turning very quickly into "wife explores without prior discussion and then convinces husband it's ok through sex". That's not really sharing... I imagine the end of the story will have Stefany as a complete slut and Oliver agreeing to anything she wants, as long as she allows him to watch. True beta cuckold in the making.