Ben and Susan’s unusual relation – part 3

I heard a small, barely noticeable sound from Sherin’s direction and when I looked over a moment later her hand was between her legs, clamped down firmly over her crotch as she squeezed her thighs together. It looked like she was putting some pressure on her clit, possibly just enough stimulation to keep from going crazy. I thought about telling her it was okay if she wanted to masturbate, but she seemed a little embarrassed just at having me notice her and I didn’t want to add to that.

Before long my sister’s efforts paid off and I felt the familiar sensation of impending orgasm.

“Getting close,” I said softly.

Susan gave me an indecipherable grunt of acknowledgement the best she could do with her mouth still full, and pumped me a little harder. Just before I came she pulled her mouth off me and tilted her head back with her eyes closed. As my semen sprayed out it landed mostly on her waiting face, some of it even inside her mouth, with the last shot falling short and midway down her stomach on the front of her shirt.

I was kind of surprised that she would let me cum on her like that with no warning, until I remembered that she was putting on a show for Sherin. In that context it made perfect sense.

My sister stayed exactly where she was for another minute or two with her hand frantically rubbing her pussy and her face partly covered in my cum. Finally she gave a contented sigh and reopened her eyes.

“So was that good enough for you?” Susan asked, turning to Sherin who had a look of even stronger disbelief than before.

“Uh, yeah,” Sherin said. “More than I was expecting actually.”

Susan grinned and stood up, taking stock of her appearance as she did.

“Guess I probably can’t wander around like this,” she said with just a hint of regret in her voice. “Be back in a minute.”

Without making even a token preliminary attempt to wipe herself off she stepped out into the hallway in the direction of the bathroom and left Sherin and me alone in the room. There was a moment of awkward silence before I decided talking might be better than sitting around worrying about what Sherin was thinking.

“So at least you’re not freaking out,” I said. “That’s a good sign right?”

“I suppose,” Sherin replied slowly. Her gaze drifted away from the doorway where Susan had left back to me. “I didn’t think I would anyway, it’s not like this came out of nowhere. I’ve had time to think about it. The only thing is I wasn’t really sure how far you two had gone.”

“Guess you have a better idea now,” I said.

“No kidding. Can I ask you something though Ben?”

“Sure.”

“Would you mind if I watched you guys more, kinda like what we just did. Not necessarily all the time or anything, but maybe-“

“It’s fine with me,” I interrupted, waving my hand casually. “I mean it’s not like we’ve never, you know, done anything.”

Granted, the total of what Sherin and I had done together was that one blowjob she’d given me, but it was enough to make me a little more comfortable around her. Comfortable enough that I didn’t mind if she wanted to continue being a spectator of sorts. Especially since there was a good chance if we did this more she’d give in eventually and masturbate for real. I couldn’t help having a certain amount of interest in that possibility.

Before Sherin could respond Susan walked back in and went straight for her dresser.

“How come you didn’t tell me you got cum all over my shirt?” she demanded, giving me a mock glare as she passed me.

“First off I thought you would have noticed,” I said. “Second, it really wasn’t that much.”

Susan stuck her tongue out at me, then pulled her shirt up over her head without a hint of hesitation despite both Sherin and me still being there. Her breasts weren’t anything I hadn’t seen of course, and for all I knew Sherin might have seen them plenty of times as well since I understood girls were more open about that kind of thing than guys. All it really did was remind me just how short a time it had been since being half, or fully, naked around each other wouldn’t have happened. Now it was quite literally an everyday occurrence.

“So what were you guys talking about?” Susan asked as she bounced down onto the bed beside me after getting a new shirt.

“Just stuff,” I said.

“Cool. So you decide if you’re going to help us yet?” Susan asked Sherin.

Sherin’s eyes flicked toward me for a split second, then back to Susan.

“Yeah, I’m in,” she said.

“Good, then everything’s going perfectly so far,” Susan said. “Tomorrow I’m gonna have to go talk to Miss Reid and get things arranged with her, then we’ll be all set.”

****

The next day Susan decided to wait until the end of the last period to approach Miss Reid, which I agreed with. It made sense to minimize the chance of getting interrupted in the middle of their conversation, and it would make it easier to locate the teacher since she’d almost certainly be in her class packing up for the day and getting ready to go home.

My sister found me just after the final bell while most of the students were surging toward the exits and dragged me into a semi-private alcove. I looked around but no one gave us so much as a second glance as they went by.

“Have you talked to her yet?” I asked, keeping my question deliberately vague on the off-chance someone actually could overhear us.

“Nope, just about to,” Susan said. “Slight change of plans though, I need you and Sherin to give me about ten minutes then follow me in.”

I arched an eyebrow. “Oh yeah, why’s that? We’re not kidnapping her now are we?”

“Don’t be silly. I’m going to try giving her a plausible explanation for our request. I would have thought you’d be happy to hear that,” she said, poking me sharply in the chest.

“Yeah yeah, alright. I assume you told Sherin already.”

“Yep, at lunch. She’ll meet you… I don’t know, somewhere. Anyway, I gotta go. See you at ten.”

Susan leaned over and kissed me so quickly I didn’t have a chance to register the movement before she was already finished and walking away.

“You can’t…” I began automatically, then sighed and gave up. Susan had known exactly what she was doing and telling her off wasn’t going to help anything. All I’d do was draw unwanted attention if I tried.

With nothing better to do I followed in generally the same direction my sister had gone, although at a much slower pace. I didn’t really have anything to occupy myself for ten minutes other than just standing around keeping an eye on one of the clocks scattered through the hallways so I’d know when it was time. I could have gone to try and find Sherin I suppose, but I had no idea where she would be so it seemed kind of pointless.

I’d only just made it to the outside of Miss Reid’s class and leaned against the wall to wait when Sherin found me instead.

“Hey Ben,” she called.

I looked back down the hall where I’d come from as she approached. I hadn’t noticed her behind me, but she might well have turned off from somewhere else. Or she’d been following me to see if she could sneak up on me, although that was more my sister’s thing.

“Hey,” I said back.

Sherin stopped next to me and dropped her bag onto the floor as though it was too heavy to bother carrying it while we weren’t going anywhere. Knowing how many textbooks some students carried around with them might actually be the case.

“Did she tell you what exactly she needs us for?” I asked.

“Nah, not anything specific. We might just be to back up her story, whatever it is.”

“Which would work better if I knew ahead of time what the story was.”

Sherin shrugged. “Not much we can do about that now.”

“I know.”

I felt a little better having Sherin there waiting with me. It meant I didn’t look completely suspicious hanging around by myself, plus it wasn’t a terrible thing to be seen with girls who weren’t my sister just in case there was someone who might connect the dots on our relationship.

“So it’s kinda strange, but I’m actually getting into this a little,” Sherin said. “The whole thing with you and Kris.”

“You mean watching us?”

“Yeah, except more than that too. Like… okay I don’t know if I should really tell you this but last night I went online and, well, I found some videos of brothers and sisters doing stuff. Porn videos I mean.” Her face started to get red as she spoke and she avoided meeting my eyes directly, but she kept going. “Obviously they weren’t all real or anything, but there were a couple of them that could have been.”

“Wow,” I said for lack of anything better. “We made more of an impression than I thought.”

“Yep, you’ve corrupted me for good,” she said. “Or maybe it’s partly the novelty of it, I don’t know. I’m definitely looking forward to next time though,” she finished a little shyly.

“The real thing’s better than porn huh?”

Sherin nodded emphatically, which for some reason made me feel good.

“You think we waited long enough yet?” she asked, gesturing toward the classroom we were standing outside.

“I don’t know, close enough I guess.”

I opened the door and let Sherin go first before pulling it shut behind me just in case. Susan and Miss Reid were indeed inside, my sister sitting casually on the teacher’s desk with her legs dangling over the edge as the two of them talked. Their conversation had temporarily stopped as we interrupted, but Susan grinned as she saw us come in.

“You remember Ben don’t you Miss?” Susan said. “And I’m not sure if you’ve ever met Sherin….”

“Um, no I don’t think so,” Miss Reid said a little hesitantly.

“Well anyway they’re the ones who are going to be practicing with me,” Susan said. “I’m sure you can trust Ben can’t you? He’s always been quite respectable as far as students go.”

Miss Reid didn’t comment directly on that statement, but her face showed a hint of agreeing with my sister’s assessment of me. I didn’t know whether to be proud about that, or annoyed. Maybe both.

“You’re Susan’s brother aren’t you?” Miss Reid asked me. “And you ended up in the same drama class. It’s funny I never thought you’d be interested in that.”

Neither did I. Nevertheless that was apparently the story we were going with so I was better off not correcting her.