This story is number 5 in this series. Please read the previous volumes, and thanks to everyone for the great feedback.
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When breakfast and coffee were done, Sheryl said she and Becky were going shopping as soon as they had showered. I volunteered to clean up the breakfast things and the two of them vanished upstairs. I puttered around the kitchen, making another pot of coffee, thinking I might just spend the day watching sports or a movie or whatever. "A lazy day, that's just what I need." I thought to myself. I decided to start by playing a game on the computer, and I headed up to my room.
When I walked past the bathroom I heard the shower running, and I also heard voices. Both girls were in the bathroom together. One was showering while the other waited. Or maybe one was already done. I couldn't believe my luck, and, throwing caution to the wind, I quickly retrieved a CD from my room and squatted on the floor outside the bathroom door.
Just as I looked under the door I heard the shower stop. "Rats." I thought, "they're already finished!" However, I peeked anyway. To my great delight Becky had just finished her shower and Sheryl had not yet had one. Sheryl was clearly visible, she was naked and sitting on the toilet, obviously waiting for Becky to finish. The shower door opened and Sheryl stood. Becky and Sheryl were standing naked face to face! I could see them both in profile, and quickly looked up and down their bodies. Then, Sheryl got into the shower and closed the door. Becky started dressing, and the show was over.
I went back to my room. I was fully erect -- just seeing the two women in the same place while they were both naked was amazing. They were obviously comfortable enough with each other to do that. They had shared a bed last night, Bob wondered what they wore while they were sleeping, after all, he knew that Becky usually slept naked. As he pondered the possibilities of this, Becky came into his bedroom.
"Hey, earth to Bob!" she said.
"Oh, uh, what's up?" I asked, finally realizing she was in the room.
"Do you want to come with us to the mall?" She asked me.
"Go shopping with 2 women who have no intention of going quickly? No thanks, I'd rather drive a rusty nail into my own foot." I said.
"Oh fine, you could just say no, you wanker!" she grinned at me, then looked at my lap. I had been so lost in my own world I hadn't considered the fact that I had an erection and was wearing track pants. Becky giggled and said, "You should really take care of that, you know." Her eyes lingered for a few minutes more, and then she left the room.
I was embarrassed, but not nearly as embarrassed as I would have been if Becky and I had not had such open and frank discussions recently. So she noticed I had a hard on, that's not really a big deal, was it? Bob heard the shower stop, and then the door open. He quickly got up and went into the bathroom, closing the door behind him.
"Hey!" squealed Sheryl. "What are you doing? We're going to get caught!"
"Don't worry, my parents are away all day and my sister won't care." I stepped over to her now dry body, pulled her to me, and kissed her. "Besides, I didn't get a chance to thank you for last night. What brought that on, and how did you learn to do that?"
Sheryl smiled at me, seeming suddenly shy. "I wanted to do it for a while, you know, let you cum in my mouth. Did you like that? Is it better than when I jack you at the end?"