Hypnoaddiction

Initiating the quest
After starting attending hypnotherapy, Alissa can be randomly seen in Succubus Tower, in the Dungeon, being "milked" by Rinny. If Lust Doll peeks on her, they would get caught (causing Alissa much embarrassment).

Soon afterwards, when asked, Alissa would mention that her job "sucks", while clearly looking distressed. She would then start visiting the dungeon on increasingly more regular basis, no longer showing up at home. Cassie, when asked, would say that she's worrying about Alissa.

Hypnoaddict
The next time Lust Doll would go to Transylvania, they would bust Alissa on her way to Succubus Tower, and acting weirdly, and decide to ask Rinny about what's going on. Rinny, when confronted about Alissa, would try to avoid, but does the bad job at lying, and soon spills the beans: at first, Alissa used to pay with money, but soon started paying with her body, and that's when the things started getting creepy; recently, she drastically increased amount of visits, and while, being succubus, Rinny sees nothing bad in loving sex, she's worrying that Alissa is kinda addicted to those sessions, doing them at expense of everything else.

Then Alissa herself shows up. Lust Doll may just capture her (requires Strength of at least 8), or talk with her. When confronted about the hypnotherapy addiction, Alissa finally snaps and tells that her job sucks: she's mistreated, there're tons of stupid rules, and she can't even talk back to annoying customers! The only reason she didn't quit is because it's the only way she can make money and not being useless freeloader.

Damage control
Realising that Alissa respects Cassie's authority much more, Lust Doll tries to ask her for help. Unfortunately, all she achieves by attempts to explain that Alissa should take it easier is to make Alissa decide to drop all jobs, becoming freeloader again...

Lust Doll decides to talk to Rinny about it, only to learn that Alissa's addiction isn't gonna end so easily, and, if not satisfied, can cause some... side effects in her behaviour. The only way to deal with it is to not let her satisfy her lust, until she recovers.

Going back home, Lust Doll would see Alissa trying to... "attack" Cassie. They can side with either of them, though ultimate outcome is the same: Alissa would get tied to the bed, and two would wonder what to do with her.