"What's yours is mine"

Aaron's vision went dark as Natalie closed her eyes, their shared face twisting into an evil grin. He felt her presence within him again, but this time worming around his body, pulling, tugging at him until he finally felt something burst free from his crotch.

Natalie opened her eyes and giggled when she felt Aaron's horror flow through her at the sight of his cock hanging between her feminine thighs. Even as they watched, her excitement caused it to slowly rise, bobbing up in time with her heartbeat until finally standing fully erect.

It twitched as Natalie brushed her hand against it, tracing a finger from the tip down to the base where it joined her pussy.

"You're bigger than I thought," she admitted. "I guess you needed at least one redeeming feature. Hard to hold onto a girlfriend otherwise, huh? But it's mine, now. And I'll bet a million dollars it's the only part of you Sasha is really interested in."

Aaron struggled inside his sister's skin as she picked up his phone, his fear rising as he realised what Natalie intended. He hoped that Sasha would be too busy to check her phone, but the reply came almost instantly.

"I guess we can kill some time while we wait," Natalie said. "Hey, have you ever tried sucking your own cock before."

She laughed at Aaron's emphatic mental denial, but a quick search through his memories proved him a liar.

"Oh my GAWD, you're such a fucking freak! Well guess what, weirdo: Now you finally get to succeed."

With a slice of the silver blade, Aaron felt his dick detach itself from Natalie's crotch and watched as she held it in front of her face.

"You know," she mused. "This is actually kinda fucked up. I mean, I'm totally about to suck my brother's cock. Isn't that the weirdest shit?"

Yes! Aaron agreed. This is too weird! Don't do it!

Natalie rolled her eyes. "Whatever, it's my dick now.*

Her whole body jerked when she licked the tip and she almost dropped her cock onto the floor.

"Holy shit," she panted. "That was intense."

Taking a firmer grip, she raised it to her lips and kissed the head. A shiver ran through their shared body as she slowly pressed it further into her mouth, feeling her heartbeat throbbing on her tongue.

Aaron wanted to retch, to gag, to spit the thing out but instead was **** to taste every inch of his former penis as Natalie suckled gently on her disembodied cock, eventually pulling it free with a pop. She waved it in front of her, her saliva cooling on its skin.

"Wow, this feels amazing! I was totally going to think of a way of destroying you or something, but I'm definitely keeping this. At least until I find a better one. Speaking of, how would you feel about getting fucked by my boyfriend?"

The thought of being penetrated by a guy while trapped in Natalie's body made Aaron feel violently ill, but Natalie just laughed.

"Awesome! It's on the to-do list! And I'll totally suck him off first. I usually don't swallow either, so that'll be a treat for him."

Aaron felt the pleasure of moist warmth on his cock one again ruined by the sensation of said cock in his mouth, this time as Natalie ran her lips along the shaft like a cob of corn, her tongue swirling around as she did so.

A sudden gasp made Natalie spin around, whipping the cock guiltily behind her back to find Sasha framed in the doorway.

"Natalie?" Sasha asked, clearly confused. "What are you...?"

"Wow, you got here fast." Natalie panted.

Before Sasha could say anything, Natalie guided Aaron's cock back between her legs and reattached it before spreading her hands wide around it.

"Recognise this?"

Sasha glanced from Natalie to her cock and back again, her look of confusion deepening.

"...Aaron?"