PARIS: More to the point, what is she?
CHAKOTAY: Most likely a sentient computer programme. I checked the Starfleet database. This kind of thing has happened before. The Enterprise-D under Picard was once taken over by a holo character.
KIM: We studied that case at the Academy. It gained control of the ship from inside the holodeck.
TUVOK: Marayna may well have done the same. She was able to silence the intruder alert by an apparent act of will.
The only reason a hologramatic sex slave would not sleep with Harry, is if she spontaneously developed the sentience to run.
Things EVOLVE to escape a humping from Harry Kim.