With the house to myself after the twins left with a friend, I could do anything I wanted. I thought about the sisters that I had met last night in the hot-tub. I anticipated that there would be more of that. I decided to finish my homework for the weekend and be free of that hanging over me.
An hour later, I heard a strange tapping noise from my bedroom. It got my attention and I listened to hear where it was coming from. It didn't sound like a knock on the front door or the back door. The tapping came again. Maybe it's a woodpecker pecking on the side of the house. That didn't seem right either. The tapping came again but louder and more taps.
I got out of bed to investigate. I grabbed my robe off the back of the door and was in the process of pulling it over my naked body when I saw the source of the tapping. Sarah and Sandy were standing in our picture window that looks into the backyard. Sarah was rapping her knuckles on the window pane as she had her face pressed to the glass so she could see inside. Sandy was beside her with her back to the window. I guess she was making sure no one saw them. Sarah grinned when she saw that I was naked and in the process of pulling my robe on. I pointed at the backdoor and headed that way.
I opened the door and the two of them slid quickly through the gap before I had the door fully opened. They wore tight tee-shirts with no bras. Their nipples pushed on the cotton material. They had cut-off jean shorts and gleaming white sneakers. Their hair was down and it hung well past their shoulders to the small of their backs. Their erect nipples had the expected effect on my dick and I didn't even realize that it had lifted and was poking through the gap of my robe until their eyes went wide and they put their hands to their mouths and snickered. I grabbed my robe and pulled it together but there was nothing to be done about the tent in my robe.
"What's up?" I said.
Sarah and Sandy giggled and Sarah pointed at my crotch and said, "It looks like that's up." Sandy burst out laughing and Sarah gave an elbow to Sandy's ribs. Sandy elbowed her back, knocking her against the closed door. Angry looks flashed back and forth between the two of them for only moments and then Sandy began caressing her left nipple with her right hand. I doubt that she even realized that she was doing it.
Several moments of silence passed between us and it was clearly making them uncomfortable. Finally, Sarah stumbled out a sentence to break it. "Ummm... ummmm. We are actually here ... ummm ... for that." She pointed at the tent in my robe. She was rocking nervously from foot to foot as she spoke. Sandy just nodded vigorously when Sarah finished and pointed at my tented robe too. I let more silence fill the room. I wanted more information about what they wanted with my cock and I just wanted to mess with them a little.
After nearly a minute, I pulled my robe apart and let my erection bounce upward and point directly at their wide-eyed faces. The girls turned to each other and Sandy whispered, "Fuck. It's huge. We have to get a couple of selfies. Those snooty bitches would never believe us without the selfies."
Sarah giggled and turned back to me. She spoke to my bouncing cock rather than my face as she said, "Well. Ummm ... We wanted to take some selfies of us with your big dick. We won't get your face. We just want to have some proof to show the class princess and her court. They would just say we made last night up just to make ourselves look woke." Sandy just nodded. She was fiddling with her nipples again. Sarah saw her doing that and swatted Sandy's hand away from her tits.
I got the gist of their request but I wasn't pleased that they planned to blab our hot-tub session around their high school just to make themselves look more 'woke'. I got it though. High School life sucks when you're on the outside of cliques like the class princess and her court. I had experienced it not very long ago. I said, "What's your plan? Just take cell-phone photos of my erection to show the princess?" Sarah grinned and nodded and pulled her cell-phone from her pocket. Sandy followed suit and showed me her cell-phone.
I grinned at them and continued, "If your intent is to brag about how big the dick was that you had sex with, you'd need to put something in the shot for comparison."
Sandy said, "You mean like a ruler or something?"
I smiled and said, "That would work, but then the princess would just say that you downloaded the photos off a porn site."
Sarah's eyes widened like she had an idea. She looked at Sandy and they had that twin's communication thing going on. She turned back to me and said, "What if we took selfies of ourselves kissing your dick? That would be proof, huh?"
I smiled and said, "That would be undeniable proof." Sandy took my hand and pulled me into the living room and Sandy took several shots of Sarah with her lips pressed to my knob.
They got together to review the shots and then Sarah said, "This won't work. These pictures look like I kissed a big dildo. We have to get Dex's hips in the shot and take some shots to show how big it is and then show us sucking it into our mouths. Sandy was on board with that plan and we all moved into position. Sandy took pictures while Sarah first kissed my knob and then pushed her lips on and slowly pushed about a third of my cock into her mouth. She gripped the base near my balls. Sandy said that she was going to switch to video and Sarah began her blow-job as she looked at the camera. Sandy giggled and said that she wanted her turn.
