Mumbai: The BKC police have registered an FIR against a woman for allegedly blackmailing a 29-year-old real estate developer by threatening to implicate him in a rape case unless he paid her Rs 2 crore and a 2BHK flat in Bandra. The woman, identified as Prerna Lohar, is also accused of threatening to kill him and circulating their intimate photographs among his relatives in an attempt to malign his reputation.