Masturbating

She was laying on a couch that was in the office with her pants pulled down and her fingers plunging into her pussy as she moaned loudly. She had her other hand in her shirt and squeezing her breast. You smirked a little as you looked back at Kristen who was running her tongue slowly along your cock tipped tail.

"Mmm, she's all alone in there with practically her whole hand in there the little slut," you said with a laugh as you gave her a grin. "I always knew that she had a naughty side."

"Mmm, agreed," Kristen said with a grin as you both imagined what you were going to do to her. Soon the three of you would be such sexy Succubi together and fuck so many men and women to Lilith. "So, what should we do?"

You looked back into the room for a moment and smirked a little. You could smell the sex coming from Mary, this had to be driving her insane. You finally nodded a little and raised your arms as you formed an illusionary image over yourself. You now looked like your normal human self, still naked but you could easily pass as yourself.

"And what's this?" Kristen asked as she pouted a little at the absence of your tail to lick.

"I'm going in there with this glamor," you said as you struck a sexy pose. You weren't nearly as hot as you were now that you were a Succubus, but you needed to make sure that she wasn't scared. "Come in in a minute, I'm going to talk to her."

"Yes mistress, go and get ready our new sister," Kristen said with a wicked smile.

You pushed the door open and ran inside as you quickly closed the door, pretending to lock it as Mary jumped up. Her breast was now exposed and her nipple was erect as she blushed and pulled her hands away from her private parts, but looked scared when she realized you were worried.

"What's going on?" Mary asked.

"Kristen, she's a Succubus... I... I barely got away!" You said breathing heavily, your breasts heaved with each breath. "She tore off my clothes and I ran as fast as I could, I think she was right behind me... what were you doing?"

"Umm... nothing," Mary said as she fixed her clothing and ran over to you and hugged you tightly. "Come on, let's see if we can find you some clothes and..."

Kristen tore the door off its hinges and laughed evilly as you moved behind Mary, pretending to be scared as you did. "Nowhere left to run you little sluts... soon you'll be servants of mistress Lilith just like me!"

"Kristen, snap out of it, this isn't you!" Mary called out, trying to get through to your sister. "She's your sister for crying out loud!"

"I don't care, I just want her fucking pussy, and yours too!" Kristen cackled. "You're trapped here, I won't let you get away!"

You leaned into Mary's ear and whispered into it as you gently wrapped your arms around her. "It's not so bad you know... fucking for the rest of eternity..." you whispered which sent shivers up and down her spine and you ran your tongue along her ear. "I know it makes you wet, you want it, don't you?"

"Ohhhh..." Mary moaned as you squeezed her breast through her shirt.

"Say it, say you want to be fucked..." you said with a hiss as your facade faded and your demonic body re-emerged as you pressed your breasts against her back. "You want to be a succubus don't you?"

"Ohhh... I..." Mary started to say. "You're demons, you're fucking hot demons... I want..."