While both of our parents were away on a trip, my younger childhood friend came to stay at my house, and we were left alone. I've always thought of her as a little sister, but she innocently said, 'Let's take a bath together like we used to!' She forcefully took me to the bathroom, and she started undressing without any inhibitions! I didn't know where to look, and various parts kept brushing against me, causing a full erection! Somehow, I managed to hide my erection from her, but after the bath, as she wandered around in just a towel, I reached my limit!
