Patience was never a virtue I possessed, and I proved that by swinging open the door the first opportunity that I had. What I saw both shocked and disgusted me. Lying on the bottom bunk of our bed, was Kari, shirtless and with no bra on; on top of her, was T.K., also shirtless, fondling her breasts.

I watched for a second, as T.K. licked my little sister's full, round, boobs, and kiss her large, pink nipples. And then I saw Kari move her hand inside the front of his pants, where I saw a huge bulge, bigger than anything I could ever produce—perhaps it ran in his family—, growing. They would have continued even longer, and perhaps even more intimately, if I hadn't opened the door and invaded their privacy.

"What the fuck are you two doing?" I raged, as Kari rummaged around, trying to find her bra to cover herself with.

"We were…"

"We were just having a little fun!" T.K. finished for Kari.

"A little fun?" I yelled. "You call this a little fun! This is serious! What kind of guy wants to come home and see his little sister and her boyfriend doing the nasty…and on my bed?"

"Tai, don't make a big deal out of this," Kari said. "I've seen you and Sora do much worse together than T.K. and I did today."

What was she talking about?

"What? When have you seen me and Sora have sex?"

"Last week," Kari answered defiantly. I saw a look of shock pass over T.K.'s face. "You thought I was sleeping, but I heard you open the window and let her in. I watched in disgust, shock, and amazement at all of the things you were doing to each other. You didn't need to wear a condom, though, because I went with Sora the other day to help her get some birth control pills from her doctor."

I blushed. Had Kari seen my dick? Sure it was big, but compared to T.K.'s, she must think I'm a real loser.

"Oh, and I've got another question for you," she started as T.K. fastened her bra for her and they both put their shirts back on. "Do you shave your pubic hair, because I didn't think I saw any when you and Sora were having fun on your bunk, and it really doesn't look very sexy. No offense, but after seeing both yours and T.K.'s, his looks a lot more hot."

I was completely in shock. Kari had seen me naked! And T.K. too! And Matt said that shaved pubic hair was in. I thought he looked hot without any, but then again, his dick looked even larger without a blonde bush to cover up half of it! Damnit! What am I doing? There are many more important things at hand, besides making my penis look sexually appealing.

"Kari, I want you to shut your trap right now! You have no right to watch Sora and me during our most intimate times! Why were you watching anyway? Did I turn you on? Well I've got news for you, I'm your brother! That's just wrong. Or was it Sora that you wanted to watch?"

"Shut your fucking mouth, Tai! I watched so that I could figure out how to please T.K. I think I succeeded, didn't I, Teeks?"

"You sure made a new man out of me!" I could see his already huge bulge getting larger as Kari once again began to rub it.

I didn't object.

It's not that I didn't care—oh, they were sure as hell gonna hear it from me later—but it was something else, something very embarrassing; I felt my dick begin to erect. I couldn't tell who turned me on more, T.K. or Kari, but I just stood and stared at them as they were beginning to start their ordeal over again. By now, my protuberance was clearly visible, but Kari and T.K. didn't see it.

And then I snapped out of it.

"You two, get off of each other…NOW!" I yelled as Kari's hand found her way into his pants and began playing with his enormous penis. I couldn't really tell what was bigger, her hand or his dick, which must have been at least a foot long; what a monster, and for a fifteenn year old! And then T.K.'s arms went up Kari's shirt and jiggled her large breasts. I hadn't ever noticed that Kari had developed so much, until I saw as they both began to moan in pleasure. "I can't trust either of you enough to leave you alone here. I hate to do this, but you're coming with Sora and I on our date."

"Where are we going?" Kari asked.

"A hotel," T.K. answered sarcastically.

"We're going to the movies, and if I ever catch you two in the act ever again—or at least until you're eighteen—I'll find the most horrible way to punish both of you, and don't think that I won't!"

I heard Kari whisper something like, "Spanking."

"Get your coats, you two, we're leaving. AND YOU'D BETTER BEHAVE TONIGHT, OR SO HELP ME GOD!"

They obeyed my orders, and we made our way into my car.