I mistake my shy stepsister for my girlfriend and I end up fucking her very hard until I make her cum.

My naughty stepsister is afraid of being in her room alone at night, sometimes she changes to the room where my other stepsister or my stepparents are, this time she in my bed and I confuse her as if she were my girlfriend, since she My girlfriend told me that she would spend tonight with me, what a wonderful confusion and I really liked it.