I thought this wasn't bad. I found the wife to be a nice lady and she's pretty cute when she was asking for a foot massage and stuff (even if she's not exactly my type, I like lil' titties). And it works well that the brother is such a dick as it'd be fun to really cuck him. A few things though...
I had the MC call his brother for a ride, but then he was surprised about him being there - makes no sense.
I'd have liked the MC to have the option to be more vocal. For example, I want him to tell the wife that no vacations was BS when it first comes up, I hate it when those little things linger, he easily coulda continued the conversation as she left the room to check on stuff. Or when the brother is going on about being self-made but the MC thinks that the father paid for it all - I'd rather have had an option for him to say that.
The 'a' menu seems to have been disabled, you know where you can set it to a standard font and things, and while the font in the game was fine, I'd have liked to have used the text scaling to make it a bit bigger. I don't think I've ever noticed that not being in a game I thought it was a default feature of renpy.
My main problem with the game though is that the stats are never explained. I liked the wife so was going for love rather than hate (but does this enable/lockout sex content, or change the flavour of it). I disliked the brother so went with hate rather than love points there as I'd like to go full revenge on him, but then later brother points and enemy points are introduced... so what does what?