My sister

As I collapsed on the floor in shock and I heard the unmistakable sound of my sisters laugh. I looked up and saw her standing in the doorway with her hands covering her face, barely concealing her huge grin.

"Oh…my god" she laughed "I can't believe I caught you masturbating!"

"WHAT THE HELL BECKY!" I yelled "GET OUT OF HERE!"

To my surprise she took a step forward into my room.

"What are you watching?" She asked as she walked over to my computer. It was like she didn't even notice that her younger brother was laying totally naked at her feet. "Why are you watching porn with the volume up so loud?"

"GET OUT!" I yelled at her again as I scrambled to cover myself.

She stepped over my naked body and sat down on my bed laughing. She seemed to be enjoying my embarrassment.

"Oh my god" she giggled "I thought you were having sex!"

"What?!" I asked

"I got home a couple minutes ago and all I could her was a girl moaning from upstairs. I though you'd finally got a girlfriend and invited her over while the house was empty. Well, I was just gonna leave you two alone but when I saw your door was wide open, well…"

"You were spying on me?"

"Hey, I'm not the one watching porn so loud the neighbors can hear" she replied

"Yeah, okay sis, look I'm sorry. Can you just get out of my room now, I'm kind of naked" I said

"Oh I can see" she said seductively. I watched her look me up and down before settling on crotch where I was struggling to cover my erection. "What's the problem, we've seen each other naked before"

"Yeah but we're not kids anymore" I replied

"Oh, I can tell little bro" she smiled "you're grown into quite the man…in all the right places" she said teasingly as her eyes glanced at my erection.

"I…errrr…well, umm" I stuttered. She'd caught me off guard with that last sentence.

"Well anyway, don't let me interrupt you any longer" she said as she jumped off my bed and walked towards the door.

I got to my feet as she left the room but she turned at the last second, catching a unblocked view of my full errection.

"You should really get a girlfriend" she giggled "it's not fair on us girls, if you get to keep that monster to yourself"

I spun around, trying to cover myself.

"And a great ass too" I heard Becky say as she left the room "I never knew my baby brother was such a stud"

Once she had left I walked across my room and pushed the door over, not shutting it completely. I collapsed on my bed and tried to get my head around what had just happened.