Note: All persons are over 18.
*****
"Mom!" My sister yelled as she ran from my bedroom.
"Fuck", I said as I tried to pull up my pants and turn of my computer at the same time. That was all I needed. I guess it was my own fault. I didn't lock my bedroom door, and my sister walked in and caught me stroking my cock as I watch a video of her putting two fingers inside her pussy. She yelled at me and then yelled for my mother.
"Mom!" she yelled again. My youngest sister was a spoiled brat, who my father thought could do no wrong. He always took her side. My dad protected my sisters with an almost worshipful fervor. I had once been caught spying on my older sister and her friends in their underwear and he had threatened to kick me out of the house. If he found out I had a sexual video of his baby he would not only kick me out, but he probably try to kick my ass too.
I heard my mom coming upstairs. "What is it Miranda? What is wrong?" She said as she came closer to my bedroom door where my sister stood.
"It is Keith. He was looking at a video of me naked and he was jacking off to it. Come see." She yelled as she burst in.
Fortunately, I had turned off my laptop and gotten myself presentable. So I tried my best to look confused and innocent as they both came into my room. "What is it mom? Why is Miranda yelling?"
This made my sister so mad she was turning red. I had hoped she would just let it go, since the question that would obviously come up, would be why she made a video of herself masturbating. But she was not to be swayed. It looked like she was willing to spill the whole story.
"He knows, mom. This pervert knows exactly why I am yelling. You disgust me you pig." She was spitting out her words at me.
Mom was still trying to figure out what was going on. "Calm down Mira, tell me what happened."
Miranda finally turned to face mom. She must have been so mad she wasn't thinking clearly, she WAS going spill it all.
"Mom, you remember when Cassie came over after graduation. Well we had a little bit to drink..."
My mom raised her eyebrows, but let my younger sister continue.
Miranda looked a bit nervous now that she realized what she was about to tell. "Well we were being silly and we ended up taking videos of each other naked. I don't know if Keith has the one I took of Cassie..."
I did and it was pretty fucking awesome.
"But I caught him looking at the one of me and he was touching himself while watching it." With that she turned back to me and her anger resurfaced. "Don't deny it, you fucker!"
I raised my hands and shrugged. "Miranda, you are my sister, I couldn't get sexually aroused by you if you danced naked in front of me right now."
"Fuck you, you are a lying sack of shit! You were jacking off..."
My mother stopped my sister's rant with a hand on her shoulder. She almost seemed to have a slight smile on her face. Was she amused by how crude Mira was talking or was it something else?
Looking at me, she asked. "Keith were you looking at pornography?"
Ok that much I could accept. It was awkward but I answered. "Yes mom, I am sorry, but it wasn't Mira. It was just regular naked women. I wouldn't even want to see my sister naked. Besides, how could I get a video of her naked if she wanted to keep it private?" I knew how, she had left her phone unattended and I got a hold of it before the auto lock feature enabled. I had discovered the videos and emailed them to myself.
"Mira, it was probably just a naked women and you felt vulnerable about the fact that you had made a video and imagined it was the same one." My mother said as she tried to lead my sister from my room.
Miranda was looking at me like she wanted to murder me. I should have left well enough alone, but I didn't.
"That is probably what it was. I mean come on you are my sister. That is gross!"
She pulled free from my mother's arms and ran toward me. I thought she might hit me, but instead she got right up to me and then lifted her shirt and bra. Her tits were so close to my face that if I had stuck out my tongue, I would have licked a nipple.
"Gross huh, you are not turned on by my naked body because I am your sister? You are lying, you know how I know, because you are a fucking pervert."
"Miranda!" My mother yelled. "What has gotten into you? Pull your shirt back down, right now. We need to talk."
My sister turned slightly to look at my mother, which caused her stiff nipple to brush softly against my cheek. I thought she would recoil from the touch but she just held it there.
"Mom, why don't you believe me?" Miranda whined. "He does get excited by me. Look at his crotch."
All three of us turned to look down between my legs. Yep, no denying there was a large tent being formed. I looked at my mother expecting disgust, but instead she had that same smirk on her face.
"Mom," I pleaded. "There is a naked breast touching my face, of course my body would react. Please talk some sense into her."
"Oh, so if I were to stand over here and strip naked you wouldn't start rubbing your cock?" My sister asked as she backed away.
"Yes, exactly." I stated.
"Oh yeah, I will show mom what a pervert you are." My younger sister said as she pulled off her shirt and then started to unzip her jeans.
I looked at mom to see if she would stop her, but it looked as if she were mesmerized by what was happening. It seemed she was going to see how far this would go. Even though so much blood was flowing to my cock, my head started feeling hot and I had a slight dizzy feeling. This was unreal.
I looked back to my sister who was pulling her jeans off her legs. She hesitated while she looked at my mother and then at me. My cock was getting stiffer. She closed her eyes for a second and then pulled her underwear down.
And there it was. The tight little pussy that I had just been jacking off to.
My mother stood shocked. She simply whispered, "Mira."
I was so caught up in seeing my mother staring at my sister's pussy that I didn't notice I had started to rub my cock.
"See mom, now do you believe me. Look at that pervert rubbing his big cock, while he looks at my pussy." She wasn't as loud as she had been, and her voice was kind of raspy.
My mother turned to look now at me, then at my cock. She touched her fingers to her lips and then said softly. "Miranda, get your clothes and go to your room. I will talk to your brother."
My sister did not look angry anymore. "No I want to stay."
"Miranda, I will come and talk with you later, please do what I ask."
"No mom, I know you want to see his cock. I want to stay." My head was buzzing with heat at the looks they were both giving me.
I watched them as they looked into each other's eyes for a moment. Then my mother turned to me.
"Do you want to pull out your cock and stroke it for us?"
I nodded. "I will if Mira puts her finger inside her." I barely got the words out.
My mother looked at me and asked, "Like in the video of her, that you have."