everything else is there to resemble a rape - violation, helplessness, and the poisoning of what could otherwise be a source of joy.
Ivy's victims are aware of what's happened to them, that they were forced to do her bidding in a way that quite likely abrogates their moral code and sense of self. They're aware, either during or after the effects wear off that they were powerless to do anything about it. And kissing a beautiful woman should be a thing of simple uncomplicated pleasure that doesn't leave you a drone.
By the articles' own criteria Ivy's whammy kiss qualifies.