Surprise Pace Change

Just as I started getting close to finishing, Sam stopped what she was doing at looked directly at me, she said "Ok so this is a little to slow for my liking so I am going to speed things up a bit." Before I could say anything in response she starts inserting more fingers in my ass first starting off at two fingers moving rapidly in and out then skipping three and going for four, my face completely filled with ecstasy as I sit there and let my older sister ravage my ass with her fingers. She then slowed down a bit and started stretching with her four fingers opening up my ass making it wider. After a few moments of stretching she started to giggle and looked at me saying, "Now its time for some real fun." Me now being completely aware of what she is planning to do started to panic only being too late as she started to ball up her fist and slowly started shoving in my ass. The pain that started quickly washed away as the pure pleasure from her first filled my body. Just moments into the act of getting fisted by my older sister my dick erupts spewing my load all over her face and the wall behind her. She then quickly closes her eyes and stop the fisting, she looks at me and says, " Well it looks like we both have something in common, I like fisting men and you like being fisted."