Tiny Tim

“Baby?” Mom suddenly said in a motherly voice. “Mommy needs you to be a very good boy now, and mercilessly abuse your sister’s tight little asshole!” With this, we both heard Ava release a low, guttural noise from the depths of her throat. “I need you to take your hard, big, fat cock, and shove it deep into your sister’s bowels over and over again, until you explode inside her. Can you do that for Mommy?”

As Mom pushed two fingers underneath the hem of Ava’s panties and pushed the fabric out of the way, I almost filled the condom without even touching my dick!

I reached forward and carefully worked the buttplug out of Ava’s ass, as Mom readily spread her daughter’s legs as far apart as she could manage. Though, as it turned out, I wouldn’t have needed to be that careful, since Mom had used so much lube that it almost fell out by itself, once Ava stopped clenching around it.

As soon as it came out, I marveled at the sight of my sister’s gaping asshole between the cheeks that were spread apart by our mother, and that bright red kiss-mark next to it. I couldn’t hold back any longer and did as Mom had asked me.

In one steady movement, I pushed myself into my sister’s ass to the hilt without stopping.

Ava released a loud grunt through gritted teeth as she felt my member invade her, though as my balls slapped against her labia, the groan was replaced by a shrieking sound and her sphincter clenched down on me hard. This time, I was absolutely sure that she had an orgasm.

Mom removed a hand from Ava’s ass to place it on the back of my head, pull me towards her, and pushed her tongue into my mouth as I slowly fucked Ava’s ass. Like a piston, I shoved my cock into her, while her sphincter never stopped clenching as she seemed to have one continuous climax.

“OH! GOD! YES!” Ava screamed, every word punctuating one of my thrusts. “I! LOVE! YOU!”

“Give it to her, Darling!” Mom added. “Wreck your big sister’s ass! She needs this! She wants this! This is her atonement for all the hurt she caused you! She wants you to hurt her! So fuck the little slut!”

Despite her words penetrating the deepest parts of my carnal brain, I knew she didn’t really mean it. This was just dirty talk to make Ava feel like she was being used. Though I wondered if there wasn’t a little truth in Mom’s claim, since Ava had said something similar once in the middle of sex in my apartment.

So, I deviated from the slow piston-like thrusts, and instead risked actually shoving my cock into her ass once.

“YEEEEEES!” Ava screamed loudly. I stopped for a moment while buried inside her, then pulled back and started fucking her hard and without mercy. Now her words were punctuated by almost pained grunts every time I bottomed out. “JUST! LIKE! THAT! FUCK ME! FUCK! MY! ASS! WRECK! IT! RUIN! IT!”

And then she started moaning in absolute pleasure again. I kept going like this for maybe three minutes before I couldn’t hold on anymore, slammed into her extra hard one last time, and filled the condom with my first load of the night.

When my body had finally stopped shaking, and I had pulled out of her, I saw Mom lean forward and reinsert the buttplug. Then she lifted herself off Ava’s back, leaned down next her head, and whispered something I couldn’t understand into her ear. I only saw Ava nod to confirm whatever she had heard with a contented smile on her face. Though I could see that her face below the sleeping mask was also streaked with tears!

“You okay?” I asked in a worried tone, and Ava nodded again before she spoke.

“Yes, little brother. I’m more than okay. I love you!” she replied, before Mom grabbed her shoulders again, and turned her onto her back. “This was perfect. Please don’t worry. It hurt, but that’s what I wanted.”

“Why!?” I asked incredulously. I knew full well that she may have been submissive, but she did not enjoy pain!

“Because I hurt you more than I could imagine.” she said, matter of fact. “No matter how much I do to make that right, it will never be enough. And yet, you did so much for us.Tim ... I love you.”

Suddenly I was stunned. Her last words sounded like a lot more than her usual, sisterly ‘I love you’. I looked at Mom and saw her nod, as if to confirm my thoughts. That was what Mia didn’t want to say out loud when we were in the limousine. She knew my sister well enough to realize that Ava didn’t just have the hots for me. And I had no idea how to respond to that.

“Ava ... I ... I don’t know how to...” I stammered, but before I could attempt to form a complete sentence, Mom gently placed her hands on either side of my face.

“You don’t have to, Darling. She just wants you to know.” Mom said softly, giving me a piercing look that didn’t waver until I nodded.

“Let’s get rid of this.” Mom said, pointing at the condom covering my still engorged cock. The Cialis was doing a fine job, it seemed. Then she leaned into my ear and whispered barely loud enough for me to hear. “Try not to make any sounds until you’re back, Darling.”