I noticed, if you unren the rpa files, and look in the gui folder (think it was the gui-something) there's 2 files there,
patch.rpy, and patch.rpyc.
I deleted those, and voila, the game changed from landlady to mom, etc.
Seems the game has a patch baked into it, but it's a patch that is anti-incest. That patch changes mom INTO landlady. So, basically a reverse fun-patch.
But that doesnt matter now I guess if there's a new patch made. But might be worth looking into by someone with more knowledge than me.
patch or no patch, the way the dev has written the dialogues etc is all over the place. It's obvious that the dev wanted it to be incest, as you get a choice early on that literally tells you it's "+incest".
But from episode 2 and on, the MC refers to Adriana by name instead of 'mom' in almost every situation. So it's like the dev either forgot he made an incest game, or he can't make up his mind.