She said she would leave her house on a three-day family trip, so she had sex with her friend for three days (tentative)

I, my girlfriend, and her friend Aoi, who I often hang out with. Aoi grabbed my hand and leaned over me, trying to get the chance to see her, and it seemed like she was interested in me. One weekend, she was going on a family trip, so we didn't meet for three days. The day she left, Aoi and I, who invited me, had an affair. From then on, I spent many sex with her, trying to get back what I had never had before. We had almost all sex except for eating and sleeping. The time between them passed in a flash, and the day she was about to return from her trip was approaching.