Plot Summary

My beloved little sister has been getting bigger and bigger every year, but she still clings to me without a bra and doesn't seem to care. She still wants to take a bath with me! She forcefully enters the bath and washes my back, and I can't believe she did it on purpose. Her bare big tits touch my back, and naturally, I get a boner... My sister found out, but she was so excited she started devouring my erect cock, so I took this as an opportunity and came inside her again and again until I couldn't stand it anymore!