I'm having sex with my daughter's friend. After the final exams ended, I ended up staying at Momo's house. In the middle of the night, I needed to use the bathroom. Trying not to wake Momo, I quietly slipped out of bed. From the bathroom, I heard the sound of water and her aunt's voice... Peeking in secretly, I saw her aunt... doing it alone. Watching her like that, somehow my own crotch started to feel hot... When I started touching my crotch just like her aunt, she noticed me...