I came on a hot spring trip with my mom and my busty aunt... I went into the women's bath with my aunt, thinking 'It's okay since I'm a kid'. Surrounded by a lot of breasts in the women's bath, I couldn't help but get an erection! My aunt noticed my erection and gave me a handjob in the bath! But my erection wouldn't subside... My aunt did something even more naughty, and it turned into a very happy trip.