I came on a hot spring trip with my mom and aunt... "It's okay because you're a child," so I went to the women's bath with just my aunt. But women came in and I got a full erection surrounded by breasts... My aunt, who noticed, was masturbating secretly in the bathtub! Ppyu! Because I'm still flabby, she put my dick in her comfortable hole and ppyu ppyu! My aunt and I, whose excitement won't stop…