As I watched the fitness instructor unknowingly show off her plump ass while doing squats, my cock became fully erect. She then teasingly revealed her shiny tights that were tightly wrapped around her juicy behind, daring me not to fantasize about burying myself deep inside her. Unable to resist any longer, she began grinding against my throbbing penis, rubbing it against her soft cheeks before unexpectedly flipping me over and aggressively impaling my huge cock into her tight anal opening! Her expert skills allowed her to effortlessly control my member, squeezing and milking every last drop of cum out of me until we both collapsed in exhaustion.