Prank 3
Class was canceled because the prof had gotten sick. I wouldn't have minded so much except I'd hung around campus for two hours between classes when I could have gone home. Being Tuesday, Tammy should have still been on campus doing her workout thing with her friends, so you can imagine my surprise when I walked into the house and heard the distinct sound of female moans, Tammy's to be exact. Over the last month she'd taken to sleeping with me almost every night, though not always for sex. Most nights she was content to just snuggle up naked with me. Mornings were a different matter altogether. Once mom and dad were gone to work it seemed like it was open season on Andy's dick. I don't think there was a room in the house we hadn't screwed in, including on moms bed. One morning we were startled when mom came home for something and found us banging away on the kitchen table. Needless to say we both got a stern talking to about being more discreet. If it'd been dad that found us all hell would have broken loose. As it was, mom thought he was getting suspicious and to be more careful.
Leaving the door standing open with someone else, someone female, between your legs was far from discrete. Her room was surprisingly dark for the middle of the day, a combination of the dreary weather and heavy curtains. I could see the creamy, white ass sticking in the air near the foot of the bed, my sister lying spread-eagle in front of whoever it was that was giving her a very good tongue lashing.
It had been almost two weeks since Vickie was over early enough in the day for the three of us to play. Vickie was just too vocal for us to play when dad was home. So I wasn't about to miss this chance.
I undressed in the hallway and stepped quietly into my step sister's room, slowly stroking my already hard shaft. More than once Vickie had made sure I knew that any time her pussy was exposed, I was more than welcome to fill it up. And exposed it was.
I stepped to the end of the bed, aimed my cock at her pussy and abruptly pushed it in several inches.
"Oh fuck!" the girl in front of me cried out, pulling away from me and rolling over on top of my sister to stare back at me angrily.
"You're not Vickie!" I exclaimed in surprise, staring at the naked body in front of me. Her tits were easily twice as large as my sister's, each with very large, dark areola and hard, protruding nipples.
"What the fuck are you doing here? Who said you could stick that thing in me?" she snapped angrily.
"Sorry! Thought you were Vickie!" I mumbled in embarrassment as I backed away and then exited the room. I grabbed my stuff off the floor and headed to my room, closing the door quickly behind myself. "Jesus." I muttered as I flopped onto the bed.
The door opened slowly a few moments later, my sister poking her head in. "Hey, can I come in?"
"Yeah, sure."
The door pushed open the rest of the way and my sister stepped in, followed by the other girl. I grabbed the pillow on my bed and quickly covered my flagging dick.
Tammy said from where she lay under the other girl, "Andy, this is Erin. Erin, my brother Andy."
"Um...sorry about that. I thought you were someone else." I explained lamely.
"Yeah. I figured that part out." she said as she stood a few feet away, her hands clasped in front of her clearly shaved pussy. I couldn't help but stare at her boobs, each one hanging from her chest like a massive teardrop. Her breasts were at least as big as mom's, but on a much more petite frame. "For what it's worth, she's lucky."
"Huh?"
"The friend you thought I was? She's lucky."
I looked at her curiously. "How so?"
"Just between us, I don't usually do cocks; I mean, I can, but it has to be a pretty good one. Which kind of makes it hard, because once a guy whips it out, he kind of expects her to do something with it. So I don't usually let it get that far. Guys can be such assholes about it, you know?"
"I see." I answered, realizing now that she preferred girls and my sudden intrusion was less than welcome. Having a bi sister was getting to be a real pain in the ass. I had no idea which of her friends were 'safe' and which were 'hands off'.
She sat on the bed next to me and reached into my lap for the pillow. She tugged on it and after several firm tugs I let it go, my now hard dick sticking up on full display.
"I'm sorry I wasn't who you thought I was. She would have gotten treated pretty well, from what Tammy says."
"Well, stuff happens."
"Yeah. It does. I kind of got horny at the gym, and your sister invited me over for a shower and a little fun. She said you'd be on campus for at least another hour and we could help each other out."
"Sorry. Class got canceled."
"We'll, I'm not. Like I said, I don't usually do cocks, but I have been known to get the hots for a guy, especially if he's cute and seems nice. If you're interested, the three of us could play a little. Who knows, you might come out a winner."
"Play how?"
"Sometimes you can be so dense Andy. How do you think you play with two naked girls?" Tammy said, finally moving closer to me, standing only a foot or so in front of me. "Erin said if you could keep from blowing your load in me while you're giving her one with your tongue, that she wouldn't mind feeling you finish what you started in my room."
"You interested?" Erin asked.
"Sure."
