The wiki claims that there's a second defeat scene for the Lamia in the pyramid, but all I can get is Hypnotized Denial; are there conditions for the other one, or does it just not exist?
You need to have ass preggers enabled, as well as have your crotch be accessible!
I still can't seem to get it as an option.
There was a bug where having non-binary pronouns would prevent it. This should be fixed in the latest release!