Yeah, the first time I played that part I was pissed off also. I stop playing and did not come back for a few updates. I'll just say I am not happy with the mother's story at all. I only still even keep up with this game because I like the sister character.
I played the game to the end and after these initial situations with mother (conversation during which she insulted us) it was not so bad. But still in my opinion she exaggerated with words in conversation, I have a weak opinion about her, despite the fact that she began to say that we are a man, loves us and can not imagine life without us, which seems funny to me, because during the quarrel she had us for nothing, insulting us as if we were nothing to her.
And about the situation with sister.. At the beginning I did not like her and her behavior (I mean, for example, situations on the beach as she did to some stranger bj through a glory hole) I do not like watching situations like the woman I am interested in her, doing something to another guy.
But further in the game I convinced myself to this character and I admit that I like her more than mother, the story is more interesting.
It was also interesting with the teacher, at first it only bothered me that she often talked about how she is in love with Brock (or some other name, I forgot) But then later in the game she changed and only we mattered to her, so it's good.
I'm just wondering if she ever had an affair with another student in the past.
Long text, sorry.