I've been screwing my mom's younger sister since she got married with an old doctor. A few days ago I told her I was feeling some pain in my arm and she made me an appointment with her husband. He works at home and when I got there my aunt told me to wait because he was with another patient. While I was waiting she decided to tease me, showing me she didn't have panties and that she really needed a fuck. I got scared but I made her wish with my eyes stuck on the office door. Only later she told me her husband wasn't at home and she only made the appointment for the next day. Horny bitch!