Keep acting confident

I got to my feet and fixed my clothing. I fixed my skirt easily enough but I struggled to get my my top back in place. Even once I was fully covered my errect nipples were very visible.

The boys were sniggering amongst themselves, at one point I though they were gonna start high fiving. My sister was looking pretty pleased with herself. I guess it was just her goal to embarrass me as much as possible today. I resisted the urge to slap that smug look off her face and instead began planning how I was gonna get her back.

"Who's turn is it now?" I asked trying to act confident. Like I was totally okay with 3 guys seeing me naked.

"Mine I think" joe said as he sat down next to me "I pick dare" he began to run his hand up my bare thigh.

"Okay" I said "I dare you to go and sit over there, away from me"

The others laughed and joe looked defeated as he move to the other sofa.

"I'll go next" my sister said "I'll pick dare too"

"I dare you to take your shirt off" joe said

"I suppose it is getting pretty hot in here" she grabbed the bottom of her shirt and pulled it up over her head revealing her white bra. "If it gets much hotter I might have to take off a few more layers. David your next"

"dare" he answered without looking away from her tits.

"I dare you to strip down to your boxers"

"I…okay, I guess" he stood up and began undressing.

The game continued until all the boys were in their boxers. It was my turn.

"Truth"

There were a few groans from the group. I was guessing they were gonna get me to strip dozen too, only I didn't have any underwear.

"Who were you having sex with when your sister caught you?" John asked

I groaned. Obviously he was punishing me for picking truth. "You" I said reluctantly.

David and joe looked shocked. "You two had sex?" They asked "when?"

"This morning" John answered "just before you got here"

John was pushing his luck. If he kept this up he might not be getting anymore favours from me.

After that my sister picked dare and soon she was in nothing but her underwear as well.