FJIN-037 I ran into my friend's mom in the bath! I was embarrassed because her big breasts caught my eye, but she gently invited me...

A local recreational trip. My friend's family from the neighborhood came to stay at a hot spring inn for two days and one night. However, I was the only one who was still a virgin, so I was embarrassed and didn't really want to go. I thought I'd sneak into the bath by myself, but... What?! Why is my friend's mother in the bath?! Seeing me feeling embarrassed, my friend's mother smiled kindly and said, "Let's go in together"...