Her buzz beginning to go down, Ty thought about the aasimar's words, and memories came to her. Succubi weren't as rare in this world as they were in most settings, and they weren't all malicious. Instead of killing their victims, the succubi feeds on the sexual energy of their victim. Specifically, succubi feed on masculine energy, and incubi feed on feminine energy. Depending on how powerful the succubi is depends on how much energy they need to draw in order to survive, and power their magic. Drawing out the masculine energy causes major physical changes, taking on characteristics of the opposite gender. Succubi have to be careful not to draw too much, as if they fully change their victim into the opposite gender, they will no longer be valid targets to draw energy from in the usual way.
There are ways to draw energy from the person after this, however. Anointing the transformed as a Warlock grants the anointed powers from the same source succubi gain their magic from. However, any time they use their magic, or have sex, some of the sexual energy of the target is siphoned off and sent to the succubus who made them into a Warlock.
With a better idea of what the aasimar woman meant now, you noddded.
"It may be that we need to buy more sex servants," Ty said, as she leaned into the Aaasimar's touch. Her nipples gently brushed the aasimar's belly, and she shivered, rubbing her legs together, but then the aasimar refocused.
"I'll organize that while you're away on adventure, my lady," she said "Should I prepare Malcolm for anointing?"
"If that is what she chooses," Ty said "See what she'd like to be called now."
Ty pulled the aasimar into a kiss, as her name came to her: Miria. She had not been male before, coming to the body Ty was inhabiting to ask for power from her. She had been hesitant at first, especially at the idea of someone touched by the celestial planes wanting to bind herself to a demon-born, but Miria had proven to be a loyal and competent follower.