Matthew was standing in the doorway of the guest room. He was naked and he was touching his hard dick. His girlfriend's sister was on visit for the whole week and today his girlfriend Maya took her to a convention. So he was alone.
He stepped into the room and took a deep breath. He loved the sweet smell of Maya's sister perfume. He lay down on her bed imagining how she slept the previous night in it. It turned him on. He slowly went through her clothes. He found her bra. He was gently stroking it with his fingers, smelling and kissing it. All the time he was imagining the breasts that this bra was lucky to hold.
Then he found the most precious piece of her clothes, her used panties. He took them in his hands and watched them for a while. He was getting hot. He smelled them while imagining that he was smelling her pussy. He gently kissed them and went with his tongue over them. He put them around his dick and started to stroke himself. He closed his eyes.
Maya came home. "Hi, I'm back. We have the whole day for ourselves now."
"Hi honey, I'm here." Matthew answered.
Maya went to the guest room. "I knew you would be here. Going through my sister's stuff. Are you enjoying yourself?"
"Oh yes."
"I see you found her dirty panties." Maya grabbed his dick and started to stroke it. "You know my little sister has an interesting fetish."
"Really, what?"
"Peeing. She likes peeing on guys and she likes even more that they pee on her."
"Exciting. How do you know that?"
"Well she told me when she came. She had too, while she brought us a gift."
"What do you mean..."
"She brought us nice sexy latex sheets. She tried to convince me that we should try peeing too.