Ehm in 1.7 there was no Sarah/Shasha event. It was in 1.9 if i am not wrong. Are you sure you use the right save?
Anyway till now i use me old save and the thing go well. Try to check better you save, perhaps you miss something.
Edit
So i finally finish this v2.0 bugged version. With Allison i use the variable for continue the story.
I like the Allison story, but there are a few thing that really irritate me. Her voice in sex action! Man is so irritating! And the fact that not almost one time she say something like... i cant do that you are me best friend son. I mean ok i help her, but at last some little bit of resistance for the first few date. Every date i and up in her room, and... wtf no one hears her moan? Yes in the end after you fuck her ass, her son Markus enter in her room, but i do not understand if he see us or not.
Anyway i really hope that the extra is not like... let her son partecipate in sex with you and his mother. I really do not like it. If that happen is another choice to avoid for me.
The Jet quest isead i am just confuse. In the past version i always side with her. Because i prefer side with a gorgeous girls/women istead of a fucking moba men. Also i hate Christian so, was really easy to side with Jet. There are two thing that i do not understand
1) When we entre Christian house, in Christian room who is the girl? Is cousin or someone who look like her? I hope not his mother! I wanna fuck her and steal her to him!
2) At the end of Jet Quest there is Christian father? Why he gift me Jet? I mean i side with the russian, but the Man say you are part of me family so Jet it's all yours? Is because MC's father work for him and for him side with the russian is not a problem? Perhaps he do not know i side with them?
Anyway cant wait to know who the extra are for.