u/Legitimate_Leg3791

My 29-year-old sister goes to work every morning. She works in a bank and travels in a crowded train every day. After a long day, she comes home tired. Her bra and panties are often sweaty and have a strong smell from being worn all day. I find that smell sexually exciting. Over time, I became addicted to it and started secretly taking her undergarments at night to smell them while masturbating.