You got caught sniffing your mom's pantyhose and ended up asking her how to jack off the right way. She was too uncomfortable to teach you herself so she is making your step sister teach you. Your step sister is annoyed she has to waste her day doing this, but she puts on pantyhose and teaches you how to make yourself feel good. She quickly realized that you actually enjoy watching her rub her pantyhose feet all over her dildo, wishing it was your cock she was playing with. She even lets you cum to her at the end. This is just one of many lessons she will give you