"Dinner will be ready in 10!" Mom yelled up the stairs.
I was so hungry my mouth was practically watering. I'd been working on a college project for the last couple of hours and my stomach had been growing steadily louder with each passing minute.
"Hey, sis," Tristan said as he stepped into my room. I hadn't even heard him coming. I could tell by the little grin on his face that he had some devilish game planned.
"Tristan, dinner is in 10 minutes," I warned him.
"I know, I know, I just wanted to give you a gift." He pulled out a small red box from behind his back and held it out to me.
I eyed him suspiciously, unsure of what he could possibly be up to. "What is it?" I asked, eyeing the box warily.
"Just open it," he said with a shrug. I sighed and took the box from him, carefully pulling off the ribbon and lifting the lid.
Inside was a small, black, silicone butt plug. "You have got to be kidding me," I said. I'd never done anal before. An ex-boyfriend had shoved a finger up there once but that was as far as I'd gone.
"Do you like it?" he asked, grinning.
"Not particularly, no," I said honestly. The last thing I wanted was to put a plug in my asshole.
"That's too bad because you're wearing it at dinner tonight."
"I'm bloody not," I argued, tossing the box on my bed in indignation. I was not going to sit at the dinner table with my entire family while a bloody butt plug was wedged up my ass.
"You have to do as I say, remember?" Tristan said with a tone that made it clear there would be no further argument.
I glanced down at the butt plug, knowing that it was going inside me and there was nothing I could do about it. "Fine," I mumbled in defeat.
"Good." He clapped his hands together excitedly. "I'll put it in."
"Oh, Tristan," I groaned. "Can't I do it myself?" The indignity of having to wear it was bad enough without him putting it in for me.
"I insist, big sis," He said, snatching the toy from the box and pulling a small bottle of lube from his pocket. "Please remove your shorts and bend over the bed for me. Be good and say 'yes sir' when you do it."
A gave him a long, exhausted sigh before standing up. "Yes, Sir," I said, as I pulled my shorts and panties down. I wasn't even shy about exposing myself to him anymore, I'd gotten so used to our situation.
"Good girl," he purred, turning me around and groping my ass as I bent over my bed for him.
I felt a bead of nervous sweat trickling down my back as I heard him squirting the lube on his fingers. Suddenly I realized how vulnerable I was, bent over with my brother about to shove a plug up my ass.
"Spread your legs a little wider for me," he commanded. I silently complied. "Lift up your ass," Tristan said, bringing the plug up to my hole and parting my cheeks with the other hand.
"Yes, Sir," I sighed. It hurt at first but eventually, the pressure on my asshole lessened, allowing the toy to slip in. As soon as it was in, Tristan began to gently stroke my pussy.
"We don't have time for that," I said, even as I moved myself on his hand.
"I know but I wanted to give you a reward for being such a good girl," he said. Then he pulled up my panties and shorts and allowed me to stand back up.
It was an odd sensation having something jammed up my butt. Every movement seemed to remind me it was there. It wasn't a bad feeling, although I couldn't say it was a particularly good one either. It was simply weird.
Tristan reached back into his pocket and pulled out a small black remote control.
"Fuck off!" I said as soon as I realized what it was.
He laughed devilishly as he waved the remote at me. "I'm going to be controlling your new toy all through dinner and you are not allowed to leave the table even once."
"Dinner!" Mom yelled. Tristan bounded out of the room without another word.
I made my way downstairs much more slowly. Each step felt like it was wedging the plug further up my ass and I had to remind myself it was designed to be impossible to get stuck up there.
Mom, Dad, and Tristan were all sitting at the table when I arrived. I looked at my chair and wondered how it was going to feel to sit down with a butt plug inside me. There was only one way to find out. I sat down carefully, trying not to let my thoughts get the best of me. I was expecting it to hurt but it didn't. I felt an uncomfortable fullness but no pain.
I looked down at the steaming plate of pasta and my mouth began to water. I was hungry but I wasn't sure how much I was going to enjoy dinner with Tristan up to his antics.
"It's good to see you, Erin. You've been hiding all day," Dad said. He shoveled a fork full of pasta into his mouth and smiled. The awkwardness from when he'd seen me with my tits practically out the other day was gone now.
"I've got a big project to do, Dad," I said, picking up my fork to tuck in.
"Can I put some music on while we eat?" Tristan asked.
"Sure, but make it something tasteful. None of that usual crass nonsense you listen to," said Mom.
Tristan told Alexa to play some music and it was only when the song started that I realised why. The first vibrating pulse trembled through my butt and I jolted in shock, my fork clanging against my plate. He was using the music to cover the buzzing from the butt plug.
"Are you okay?" Dad asked me, looking my way with concern.
"Yeah, just a sudden cramp," I lied.
"Oh, it's that time..." he said, suddenly looking very uncomfortable.
I nodded and then shot Tristan a glare. My little brother simply raised his eyebrow, challenging me to do something. Of course, there was nothing I could do but sit and wait for his next attack on my sphincter.
I ate carefully, moving slowly, ready for the next vibration. Tristan was deliberately waiting for me to lower my guard but I kept him in my sights at all times.
Dad started telling us all about the horrendous day he'd had at work. They'd hired a new guy who had turned out to be a complete idiot. I let out a gasp as another vibration buzzed through my rectum, a much stronger one this time.
"Oh dear," Dad said, looking at me sympathetically.
I forced a smile but the vibration was still going. The plug was humming inside me and now that the initial shock had faded it was starting to feel quite good. I tried to ignore what was happening and focus on my Father's conversation but it was hard. The vibration was low and constant, buzzing gently, like it was massaging my anus. Every now and then it would grow more forceful before returning to its former rhythm. As it went on I felt myself getting warmer.
I shot a glare at Tristan but he refused to even meet my eye. He pretended to be focused on Dad but the smile on his face revealed his true focus. Me.
"So, why don't you tell us about your project, honey?" Dad said, turning to me.
