An unsavory idea

As Tracy was contemplating helping her sister she was struck with inspiration. "Alright ill help you but I want something in return." Tracy explained. "Sure anything." Tanya answered.

"Good then strip." Tracy declared. As Tanya felt herself compelled to comply she was soon standing naked in front of her sister. "Wow you listen well. So now I need you to bend over the bed and stick your ass out for me." Tanya couldn't believe that her own sister was making her do this. With **** as she lewdly displayed herself she felt Tracy rub her hand on her ass. Shocked she wanted to protest but Tracy was faster. "Be quiet and after every spank thank me." She ordered.

'Whack'

"Thank you"

'Whack'

"Thank you"

This repeated for twenty solid spanks giving her ass a nice shade of red.

"This is for trying to upstage me." Tracy growled. "Now spread your legs wider." Tanya felt herself spreading slightly wider before a lewd finger found her pussy. Still stuck with being quiet she couldn't protest as she worked her finger in and out. Once finished she waited silently before something bigger and harder pressed inside her. "Go ahead and speak. Tell me how you feel about your sister fucking your pussy." As she began to rock back and forth.

"Please stop this is so wrong." Tanya started before she switched. "But I cant help it your cock feels so good." As her sister picked up speed with more slaps to her ass Tanya couldnt stop herself from moaning.