NPH-205 - Mixed bathing with a niece during a hot spring trip. A situation where the niece touches the uncle's erect penis in the bathtub.

Went on a hot spring trip with nieces I hadn't seen in a long time. I peeked at my grown niece changing, got caught, and ended up bathing together. My niece playfully grabbed my penis while pretending to wash me, and I could see she was excited by my erection. When we were alone, we secretly returned to the hot spring and, remembering past pranks, started washing each other, leading to a burst of mutual lust. I ended up having my penis sucked deep into her throat in the bathtub, and then inserted into her wet vulva.