A demonic dicking

Lily glowered at my panicked face, then scanned my body with her eyes.

"Yes. Very nice. Exquisite. You'll make a fine addition to my harem, my son." She cackled loud and long. "But we're not done here just yet. For the transformation to take, you'll need to take me. All of me." She dug one hand into my skin, claw-like, and massaged her demonic dong with the other.

"I don't think I can," I gasped.

"Anything is possible," she replied. "...For me."

With that she crawled backwards, positioning herself between my newly-curvy legs. With a loose grip and the barest effort, she casually slung them over her shoulders.

"Just be gentle, okay Mom?" I whispered timidly.

Lily smiled all-too-broadly, and opened her eyes wide.

"Um... O-Okay, Mom? It's me, Brandon, remember? You wouldn't--OH MY GOD!"

All of a sudden she slammed her mammoth rod into me... And she didn't stop slamming into me, not once, for the next hour.

Claire stirred from her slumber on the bathroom floor. The normally cool tiles felt warm. And wet. Then opened her eyes, and realized she was coated head-to-toe in Lily's cum. So was Ella--Lying on the ground, coated in a thick layer as white as snow. It reminded Claire of pictures from Pompeii: the ashen figures of ancient people, frozen in time.

But Ella hadn't been the victim of a natural disaster. This was altogether unnatural. Both of them had been fucked to within an inch of their lives... And they couldn't wait to do it all over again.

Ella blinked her partially-glazed eyes and looked at Claire, watching as the other girl gulped and swallowed down more of her mother's leftovers.

Once her mouth was empty, Claire peered back and asked: "Ella... What's that sound?"

Ella brought one hand to her ear, scooping out a wad of cum and licking it from her fingers. That's when she heard it. From around the corner, through the doorway of the ensuite bathroom:

WHUD WHUD WHUD WHUD WHUD WHUD

Non-stop.

Ella answered Claire flatly, without emotion: "...I think my mother is fucking the shit out of my brother."

Claire groaned. "He's so lucky. I wish she'd use me like that... Forever... Make me into a toy, a worthless cocksleeve, I don't care. So long as she'd fuck me like that..."

Both girls moaned happily at the thought. It would be some time before either of them had the strength to get up again.

I was moaning. I couldn't stop myself.

It didn't hurt. No, it was too good. I wanted to deny it... Tell myself it was wrong... But the feeling only got stronger. Then Lily placed a hand around my neck and squeezed. I could feel my mind slipping away: I was being broken down and remade from the inside out. I remember hearing giggling, but what I can't remember is whether that was Lily... Or me.

The next part might have been a hallucination... I was already pretty far gone. Lily's grip might have cut off some oxygen, too, I'm not sure. But I'll tell you what I thought I saw.

Sigils, softly-glowing glyphs, circling my mother in the air. They sparkled with a colour that somehow I knew did not--Could not exist. Slowly, one by one, the floating signs drifted towards my mother's body and left their mark on her skin. It didn't seem to hurt--I don't know if she was even aware of it. In any case, she didn't stop fucking my prone body for a second. She just stared into my eyes with a fixed, soul-devouring snarl.

The unholy marks moved across her rocking body, down to her groin. Then they wrapped themselves around her gargantuan length--At least I think they did. Her cock was a blur by this point, forcing itself into me over and over... And besides, I was only semi-conscious by this point.

She must have cum then, or soon after. In that moment the occult symbols flashed, brighter than bright, brighter than my mother's infernal eyes. My breath left me completely, and my eyelids fell shut. I heard Lily scream in ecstasy. My core shifted, making way for her unholy essence. It bubbled up inside of me, forcing its way inside without regard for physics or my dwindling sanity.

Then... Then everything went dark.