I'm still confused on what you're trying to ask. What scene are you trying to complete or are you trying to unlock Sami C5 or Sami pregnant?
Corruption max doesn't really mean much anyways. I believe it just means you got her pregnant, which I believe there's multiple scenes where you can do that.
It might help you to look in the progression guides on the character screen too. That'll give you some tasks to get to the next corruption level.