What about a Succubus that blows hearts to Allie, if she is hit by it she becomes brainwashed and the Succubus;
1. Either uses Allie as a bondage victim till she dies taking all her energy.
2. A sexual victim till she dies or cums and her soul is drained into the Succubus.
3. Both a sexual and bondage victim till she dies.
4. A kiss where her soul is drained from her.
5. The Beautiful Succubus (Who lets say looks like Morrigan from Darkstalkers) turns out to be a hideous beast who preforms one of the 4 previous options.
6. Kisses the Succubus and mindlessly pledges to serves her mistress forever.
Finally 7. Is raped till Allie herself becomes a Succubus and attacks other girls.