Sounds interesting. As I understood it, 'Hannah's corruption' was intended as kind of an introduction into a '3diddly universe' with more corruption stories to follow. Initially the dev started 'Leela's Awakening' that was abandoned after 2 chapters and instead started 'Katie's'. Many of his patrons complained about the ending of 'Hannah' and missed a reason why Hannah fell for Orlov and even married him though this ruthless criminal abused her in any way possible. Here in 'Katie' Hannah returns telling Katie her story and the dev gives us a quite good explanation for Hannah's change of behaviour. Unfortunately the dev closes this storyline making a sudden 'good ending'. Instead of this 'ending' it might be a good start for a storyline involving revenge, corruption, cheating and even unwanted pregnancy including Katie and Brian, Hannah and Mark as well as Orlov and Wright along with some side characters like Vera, Brandon and Jacob.How about a complete rework, adapt Hannah to RenPy, combine and introduce Katie during post pregnancy, and get more of a backstory to Vera whom is mentioned briefly during Hannah's stay at Orlov's.
With the choice to see it from either Mark's or Hannah's perspective from the get go Mark would still get the reports from Orlov.
I feel Katie should go more for the blackmail route before complete Corruption, as it would fit her feisty personality, she loves Brian, and is smart enough to get into university to study medicine. So her compliance is to quick. I also feel that
Mr. Wright should be the main corruptor instead of handing Katie over to Brandon, Mr.Wright has fallen into the background too much to be considered her real corruptor "Master".
Don't get me wrong I like universe as whole, but some tweaking wouldn't hurt.
Another point to continue the story might be before Katie has to decide to either stay with Brian or not.