I ended up staying at my aunt's house while I was job hunting in Tokyo. My uncle was on a business trip to his company (Fukuoka), so we ended up spending three days alone under the same roof. My aunt's big ass and thighs, and her overly sexy lower body, made me get an erection without even realizing it. Unable to hold back any longer, I suddenly inserted my penis. My aunt was confused, but she kindly accepted me. In the limited time we had, we gave in to our carnal desires and had sex all day and night.