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, Alissa would stop going home at all.

Hypnoaddict
Eventually, on one of their visits to Transylvania, Lust Doll would bust Alissa on her way to Succubus Tower, 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. If the Chastity Belt was bought from Dalvie in Lil Shop o'Horrors, it can be put on Alissa, to prevent her from relieving herself until the effect wears off.

Alissa takes it hard, but, when talking to Cassie, Lust Doll may suggest to take Alissa out on picnic in the Forest Park to distract her. Alissa would still feel "impure thoughts", with the player having options to chide her lightly or rebuke her. Afterward, it would be suggested to try some "wholesome activity", like holding hands. When it doesn't give desire effects, the friends moves to non-romantic hugging (with the options to not squeeze Alissa, squeeze her, or squeeze her tight); but Cassie would cancel the picnic as soon as she hears that Alissa didn't take a bath for a week, insisting on taking her home and bathing, right now.

Alissa takes the bath well, but then the issue arise: she needs to be washed there as well, and they can't let her do it on her own. The two ties Alissa's hands and proceeds, but mid-process, Lust Doll starts feeling that it's kinda hot, with options being to do it properly, or tease Alissa further. Either way, Alissa would break free mid-point, and, despite attempts to stop her, would reach out to her crotch... only to stop on her own, through sheer willpower. It buys enough time to tie her hands again. But now, Alissa thinks that she should just put all decisions-making on Cassie, including wether she's permitted to cum or not, just because it's easier that way and she doesn't need to worry wether she's doing right or wrong decisions. Cassie tries to convince Alissa to reconsider, but she insists that she's too dumb for that, in near panic (and Lust Doll somewhat agrees that she's not good at making decisions), so Cassie reluctantly agrees.

Several days later, the belt gets removed... and now Alissa insists that Cassie should stay and watch over her while she relieves herself for the first time since removing the belt, to keep her under control. Nothing catastrophic happens, and Alissa just falls asleep after the deed, only to awake relatively normal. Cassie still has to teach her how to decide for herself properly, but otherwise, the life has returned to normal.