A closer look won't hurt

She may be my sister, but I was horny and she had a great body.

I moved my hand towards her chest, carefully so I wouldn't wake her. My fingers opened up one button, then another, then a third, freeing her breasts and bra of her blouse. Cassie wore a white lace bra which hugged her round breasts beautifully. She looked great. My dick thought the same, he began to stiffen.

Then I saw the best part of my sister's bra. It had a clasp on the front! Cassie loved to wear these, she said she liked how easy they can be opened, by her or a guy.

I already opened her blouse so I might aswell go all the way and open her bra too. Afterwards, I would just tell her that it somehow opened up by itself (which did happen sometimes) and that I didn't want to touch her and close her bra again. My hand almost moved on it's own and I had her bra unclasped quickly.

There they were. My sister's breasts. I have imagined seeing these since they grew in size. They weren't exactly huge, but definitely not small, slightly above average. Her areolas were small and pink.

My dick hardened more and I could feel it poking into my sister's back. I tried to move to get into a more comfortable position. Cassie shuffled and I almost panicked, but she didn't wake up.

'Damn', I thought. 'I really want to touch her tits. But she is my sister. This whole situation is so wrong'