Just her bra and panties

Becky was standing on the bottom step in just a set of matching white underwear, with a naughty grin on her face and her laundry basket under her arm.

"Hey bro" she said "i hope you don't mind, I wanted to get my laundry done, but it means ive got nothing to wear. Well, except my bra of course. You're okay with this right?"

After everything that had happened I knew fine well that she hadn't just decidedly to do her laundry. She was doing this on purpose to tease me. Of course I wasn't going to complain.

"Yeah, yeah it's no problem" I said.

"Thanks bro" she said before disappearing into the kitchen for a moment. I heard her load her clothes into the machine.

I tried to focus on the tv, but I couldn't knowing that my sister was just in the next room and was practically naked.