Work on them both

You notice the reluctancy of Jo but Bern is more obliging to the situation. Bern strokes the entire length of your cock, now bigger than before, and thicker. Bern licks the sides of it. You look at Jo. Your demon eyes pierce her soul but she is tough. "I don't know if it is right. How can I live like an outcast?"

Bern is not listening to her friend and is succumbing to the urges of Lilith. You decide to leave Bern to assimilate and work on Jo's conflicts. "Now Jo, you know that succubi and incubi are roaming the streets, feeding on the souls of humans. We are increasing in number. It's inevitable."

"I can't follow evil, can I?" Jo responds, looking at Bern take most of your cock in her mouth and rapidly fingering herself.

"Very well Jo, just enjoy the juices from your fuck buddy's pussy. You'll like that." Jo moves towards Bern's pussy and removes her fingers. Already the Lilith strain is infecting Bern and her pussy is enticing even to the most reserved of humans. Jo breathes on Bern's pussy from confusion and it sends Bern shivers down her spine.

"God, your pussy smells great." Jo licks the flowing juices of Bern's pussy, tasting a portion of the Lilith world she will become. Meanwhile, Bern is falling fast into the infection and her body is already changing with the pre-cum that seeps into her mouth. Some more cum being sucked out of your cock pushes Bern further. Her breasts expand slightly and her skin becomes free of imperfections. You feel your cum about to burst and an overwhelming sensation as Bern's soul creeps into you.