Before asking this question, I opened a Meta discussion to check if it's legal here. The question is about Pen&Paper, not videogame rules.
Vampire: the Masquerade — Bloodlines is a PC game from 2004. It is based on the Pen&Paper game, but a bit vaguely, some rules are from Revised edition, some are clearly from Requiem.
In that game if our protagonist attempts to disobey the local Prince, Sebastian LaCroix, the latter uses Dominate•• on the former and forces to do whatever he orders.
However, at the end of the game LaCroix tries to use Dominate on the protagonist twice in row and fails. Given that no diablerie took place, how could that be achieved by the rules of Pen&Paper game?
Powers that were shown in the game are prefered, but any power from the rules accessible by a vampire would be OK.