Show her Pleasure, Take Her Humanity.

Alexa struggled against the two Succubi as they tore through her clothes. She pressed against the glass, pounding on it in a panic as the scientists observed her. "Please! Save me! I don't want..." she said as her shirt and bra were ripped away, her breasts pressing against the glass.

"When we're done, all you will want is to be fucked," the bigger of the two Succubi hissed, grabbing her ass.

"You're going to be such a hot Hellwhore," the smaller said, squeezing her tits. "Just like us."

"No.... noooooooooooo!" Alexa said, her cry turning into a moan as the more powerful Succubus spread her pussy and thrust her tongue deep inside the Succubus to be's slit.

"Succubus..." The two of them said in unison. "You will become one of us... one with us..."

Alexa screamed as she felt the Demon's tongue penetrate her pussy. She screamed as she thought about her friends, her family... her whole life and world. She could feel it melting away, replaced by images of a jade skinned Succubus fucking and getting fucked. She looked up at her, and she stared at her own face, more feral and dripping with black demonic ichor, she was so far gone from who she was supposed to be... her breasts... no her tits heaved as she felt clawed hands squeezing them.

"Fuck... fuck me..." She moaned as she stared at the scientists outside, no longer with anger, but now with lust in her eyes. "Fuck... I need TO BE FUCKED!"

The slut could already feel her mind slipping away, replaced with thoughts of sex and debauchery. She couldn't even think of what her name was anymore... it had been... something? Did it even matter anymore? She cried out as her breasts and ass inflated, her skin turning green as horns began to emerge from her forehead. She pressed her mouth against the glass, licking it with a tongue that turned into a forked serpentine tongue behind fangs.

"FUCK!" She screamed as she came hard, her wings and tail bursting out as her body took on its full demonic look.

"Alexa, how do you feel?" One of the scientists asked.

"Who the fuck is Alexa?" The new Succubus said, licking her lips. "I'm a fuckin' Hellwhore, I don't need a name! Right sisters?"

"Right," the other two Succubi said, and the new one pounced on the smallest of the three, and she let out a scream of pleasure as the new Succubus plunged her tongue and tail into her pussy and ass.

"Fascinating," Dr. Michaels said. "Other strains still retain a level of their old life and individuality. It seems this strain strips even that of them."

"We should kill them," Dr. Simms said. "We can't risk this strain getting out."

"It may already be too late for that," Dr. Michaels reminded her.

"Yeah, I know, but..." Dr. Simms started to say before a commotion was heard on the other side of the lab.