I don't need to

Before I could get out off the sofa I heard Becky renter the room. She was still wearing nothing but her skimpy underwear. She bounced across the room and slumped down in one of the armchairs.

"What's on" She asked

"Nothing interesting" I replied as I struggled not to stare at her slender body. "You can have a look if you want. I tossed her the remote, but she fumbled with it and it landed behind her chair.

"Wooops" she said "I'll get it" before I could respond she spun around and bent over the arm of her chair, straining to reach the fallen remote. This left my sisters ass exposed high in the air facing towards me. I could only watch it sway in front of me as Becky struggle to reach the remote. She struggled for a little longer and I felt myself strain against my boxers as I watched the scene in front of me and remembered the sight form earlier.

She sat up once she'd retrieved the control and began searching through the channels. "Sorry if I gave you a bit of a show there" she said as she gave me a sidewards glance "although it looks like you didn't mind" she smiled as she noticed my rather obvious hard on.

"It was a pretty nice view" I replied.

"Oh yeah? I bet it was you little pervert" she said in mock disgust "can't a girl relax in her underwear without being stared at?"

"Not if she's half as attractive as you are"

"Oh, little brother, are you flirting with me?" She teased.

"Maybe a little"

"You can try and play it cool all you want, but it kind of easy to see how excited you are" she said motioning to my waist "it's quite flattering actually, I had no idea I had this effect on you" she leaned forward slightly, giving me a better look down her cleavage.

"You can hardly blame me" I replied "with my older sister practically running around naked, teasing me"

"Teasing you!? I told you, I'm only like this because I needed to do my laundry" she lied "besides you one to talk. You were the one literally running around naked, after all"