Hi guys. I was looking for how to make Natasha corrupted but without the giant breasts, I didn't find much information and the guide doesn't give much detail.
Making several combinations I was able to find a way that I'm going to share now.
after contaminating the water
Talk to her in the morning "about her being a priestess" while she corrupting and spy in her room at 16.00 hrs.
until you see her drinking and will display in the UI that "Natasha feels sick today!" (it will appear at the bottom left)
that same day, go spy in her room at 16.00 hrs, scene where her breasts grow to the maximum size.
The next day talk to her in the morning, she will tell you that wants to know you better.
go to her room at 16.00 and spy her, then enter and receive BJ. you have complete the quest.
The next day, talk to her again in the morning. she call you master and will invite you to visit her later, also that she is now a devotee of Isha.
then go to her room 16:00 hrs. spy, enter, punish her and fuck.
In that room wait until 20:00 hrs go up to the church and clean the fountain with the inhibitor.
next day watch her drink the fountain and she will comment that it tastes different. Go to her room 16.00 hrs and spy, enter, punish her and fuck again.
The next day again watch her drinking the fountain. will display in the UI that "Natasha feels sick today!"
Spy at 16:00. In the scene her breasts will reduce, commenting that she lost Isha's favor and has to make an effort.
In this way Natasha would be corrupted but without the giant breasts.
I apologize for the extensive writing but I wanted to be little more specific with the steps I took.
i hope it helps