I played a lot and I love these games, but i want to experience it in mom's perspective at least once.

If one or two games has a sharing-type son I can understand, but all of them?
There are literally hundreds of games out there to be played. You named 3 and you come to the conclusion that all female protag games has sons sharing mothers. My first question to you is, just how many games have you played? I know for a fact your "all" conclusion is wrong because I've seen the reviews of nearly a dozen female protag games that Don't involve mother-son sharing. In fact, a couple involve lesbian affairs so That blows your all theory into tiny pieces.
Secod question, just what are you insinuating about Americans? Many of these games are created by developers that live Outside of the US. Furthermore, the genre has as much if not more popularity beyond America. I seem to recall reading something a few weeks back that said there's been an increase of games being created by Russian artists. Last I checked, that's nowhere Near the US.
Finally, if you don't lke the theme, don't play it. Almost every game that I have seen in reviews, be it this site or other sites like this, have some kind of game review. Basically, you get to read the ingredients before you try it. If you're here bitching about the genre, it's obvious that you knew what was in it before you downloaded and you Wanted to play it. So coming here, crying a river about this game or any other AND insulting Americans (or any other country) means that you're either obtuse as hell, or just some sensitive, butt hurt troll trying to stir crap up. It's too much of this "I don't like this (name your topic) and it hurts my feelings" woke bullshit going around. Your creator gave you grey matter to use for something other than a hat rack. Why don't you do that and stop trying to take away everybody else's joy. Take a deep breath aand Breathe for Pete's sake!