I went on a family trip to a hot spring inn and found myself in a mixed open-air bath, and I couldn't help but get aroused by the girls' bodies, which were growing in a disgusting manner without me even realizing it. She can't hold back anymore, so when she pretends to wash her back and gently touches her daughters' bodies, her naive body, which doesn't know men, reacts violently! She had sex in the bathtub, forgetting that she was her daughter and her father.