Your step mom has always been super sweet with you even when you stepped into adulthood. Ever since you turned 18 you secretly had an attraction for her that you kept hidden away. Throughout your adulthood you caught yourself dating and fucking women that only looked like her. One day when you were home visiting for your dad's birthday, she comes into your room unexpected to kiss you goodnight and she catches you in bed with a hard on. You cover up embarrassed but she has unexpected reaction and helps you deal with your hard cock talking dirty to you, stroking, sloppily sucking and gagging on your cock.