In the middle of summer, when my air conditioner broke, I had no choice but to cool Ryo in the inflatable pool, when my sister came home with my niece. When my niece saw the inflatable pool, she was so excited! Even though I was in it, she immediately changed into her school swimsuit and started playing innocently. I couldn't Ito that she found out, but my niece, who had grown even more inside than she had grown physically, was curious about my dick and reached out for it...