Issues with the Therapist
When Sveta signs the marriage contract and moves out of her parents' place, it doesn't take into account she's still in school. It's assuming she's already graduated when she's not, according to the ensuing dialogue. I sped up the events just to check the story arc, but even taking into account of limiting therapist visits to once a week, this doesn't push the timeline past December, assuming a June start. Also, if Sveta turns into a succubus after moving out, she's basically got a hotel room that's rent free, after having a "talk" with the good Dr. Pavlov. Also, what happens to the marriage contract at that point?
The dream sequences after Sveta has sex in the hotel also don't jive. She's consciously aware of having sex by that time but the dialogue does not reflect this. The script just says she has never experienced sex when she's already aware that she has. It's even reflected in the stats as known instances.
The dialogue with the Therapist kind of conflict. First, he says she'll never be aware that she's going to get knocked up then by the time Sveta goes to the hotel, she becomes aware she's no longer a virgin. Then a bit later, the Therapist has her wanting to have his babies. This seriously needs an overhaul, IMO, especially the beginning of the arc as the conditions have changed.