Stepsister was doing yoga in her very tight and sexy leggings. Her ass looks really great when she puts them on. It's impossible to resist seeing her from behind. I came up to her from behind and rubbed my hard cock against her juicy ass. I realized that she was already very wet and entered her wet pussy up to the balls. My balls were slapping against her clit and she was moaning with pleasure. I couldn't help myself and had to cum on her brand new leggings so she wouldn't get pregnant. The stepsister put on her stained leggings anyway and continued to study as if nothing had happened.