The Mulund police have booked a 27-year-old married woman's ex-boyfriend for allegedly demanding Rs 3 lakh in extortion and threatening to ruin her marriage by disclosing their past relationship to her husband.

According to police sources, the accused and the victim were in a relationship before she married someone else. Upset by her marriage, the ex-boyfriend began harassing her, threatening to ruin her marriage by revealing their past to her husband. He demanded Rs 3 lakh from the woman, causing her significant mental distress.