Alma is a sick little girl. Probably from an abusive home, she now connects love with abuse and degrading sex and can only be satisfied by such acts. Stefan is tired of it and wants to leave. Alma's answer to this is to "faint" and seek sympathy delaying Stefan's departure once again (via translation: "Is this the first time it's happened to you?", "no".
Of course, this isn't based on any more facts than the opposing view, but if we're going to jump to conclusions and bash somebody without any basis, we need to look over both sides of the fence.
(Remember, Mark was a worthless shit for his lack of attention, then everyone realized what a filthy skank Lina was and understood.)