“Hi there,” she said, glancing around, clearly nervous, “I'm Sandi and I wonder if you'd help me with something?”“Sure,” I said, what's up...”“Come with me.” she said taking my hand and leading the way into a department store.“you guys go on,” stammered Peter, wide eyed, “I'll wait here.”She led me to the back of the store and after a nervous look around, pulled me into the family restroom. She paused long enough to lock the door then quickly stripped naked and started fumbling with the zipper. I started kissing you behind your ear, on the neck, while still caressing your breast with my right hand.I lifted your pull-over and your blouse, I touched the naked skin of your belly. I pretended to push my hand downwards, under your skirt and panty, towards your pubis, thinking to part the delicate pussy lips, to dive the finger where the skin is tender and humid, where you may lose it. But I have just pretended, I quickly returned my hand on your belly, touched your lower-most ribs,. It didn't take her long to have her orgasm.Peter knocked on the door. 'Hey Sis, I gotta take a piss,' and opened the door, which couldn't be locked anyways. Although Karen was hiding behind the shower curtain, Pete could see her nice curves through the curtain. Karen felt caught but acted like nothing happened. She decided to tease Peter a little bit. 'So, brother. How did you come?' Peter was standing on front of the toilet, pulled out his cock and started to pee. 'Just fine, thank you.'"You. She was surprised but I got up and left the room.When I woke up in the morning she was in the kitchen making breakfast for us, When she saw me her eyes filled with tears , I immediately moved towards her and hugged her asked what’s wrong. She apologized for her behavior from the previous night. I said there is no need for saying sorry, I enjoyed the evening very well. She said “Me too, but I am sorry for later, I understand if you don’t like me that way”.I said, “ Are you joking, Of course I.