I agree, wifey is a lying manipulative submissive slut in the cheating route.
Her portrayal is too exaggerated for my taste, maybe that's why I don't like her in that route.
As the MC I would agree to a divorce and move out or kick her out as soon as possible.
Then she could be used like a cheap slut all day long until her lovers have enough of her and dump her like a hot potato.
So I guess that the dev did something right then, if it was his intention to dislike her.
I'm wondering myself, I have roughly 65% Love/Respect and she still behaves fraudulent.
The influence does not seem so important or I'm doing something wrong.