Things heat up again

That night we all went back to the spa after dinner. I didn't wait for an invitation this time and nobody objected. Everyone except Paige was already topless when I arrived.

Dawn was the first to speak after I arrived, she had a vodka drink in her hand. "Hey Paige. Why don't you take your top off. Everyone else has. Even Justin got his dick out last night I hear."

"No way. I'm not stripping in front of my brother." replied Paige. I noticed her eyes dart towards my crotch as she said it.

"Oh don't be a spoilsport!" cried Amanda, "I want to see those tits too." The other girls joined in with the chastising. Would she buckle to peer pressure?

"What if Justin removes his shorts again?" asked Dawn.

It didn't take much coaxing and soon Paige was reaching for the drawstring on her bikini top. The girls weren't even drunk yet this time, I was amazed how quickly this was moving. Paige released her top and threw it clear of the spa.

Wow is the best word to describe what I felt and saw next. With the exception of this week I'd never thought of my sister sexually before and wasn't really aware of what kind of breasts she had. She easily had the second largest tits here after Kara. They were a generous C cup and my jaw dropped when I saw them for the first time. Her hard nipples were darker than the twins' and not as large as their eraser behemoths, yet they were bigger than Melissa's. All the girls were now topless.

"Nice tits sis." I can't believe I said that. I felt myself blush. Without realizing it I had become very comfortable with the sexual nature of this whole trip.

I stood and once again dropped my shorts and threw them out of the spa before sitting down again.

"Nice cock bro." said Paige, then she blushed also.

Melissa exclaimed, "Oh yeah. This is hot! Brother and sister checking each other out."

Without any prompting Melissa reached for my dick and started jerking it. I thrust my pelvis forward so my cock poked out of the water. I reached over in turn and placed my hand on her left tit, giving it a bit of a squeeze.