I had corrupted literally everything in the game but that scene won't happen. Maybe its due to my avoidance of pregnancy stuff.you need to corrupt the hospital in order to make the park moms pregnant. in the train you're gonna have to corrupt the cop girl in the police station in order to progress the train corruption till the end tho I'm not sure how required it is. anyway after the moms are pregnant and the girls use them as pet dogs, you should be able to add the girl from the train.
honestly this game could have been so much better if the guy just used more animations from the actual game engine instead of fucking around. also his writing is pretty bad, people like this game because it's extreme and has a lot of content but it's not the good kind sadly. its still one of the better corruption games out there and that basically tells you how lacking we are with this genre.
I agree though, the main draws is the sheer amount of content, and the corruption levels are pretty fun to go through. I do love when you gave games where the girls start out pretty buttoned up but once you've gone though, they get sluttier and sluttier.