JewelryThis is the no. 1 choice for mistress presents, according to Noel Biderman, founder of AshleyMadison.com. Surprisingly, Biderman says men are more likely to buy diamonds for their mistresses than for their wives. A little blue box from Tiffany & Co. ( TIF) will always be welcome but there's also the option or go online and shop for diamonds at Blue Nile ( NILE). If she's one in a million and makes you think you're going to have a heart attack when you see her, stash your cash away for a Van Cleef & Arpels necklace. This is the standout gift for the classic girl. The onyx clover necklace will set you back $4,900 but Bluefly sells a vintage one for $3,100.
LingerieYour girl on the side probably spends hundreds on lingerie to look hot for you. Have you helped her out in this department? Do you have any idea how much it costs to look hot? Agent Provocateur runs about $190 for a brassiere or at least $90 for panties and the selection is perfect for your gal if she's the dirty girl-type. If that's a little too rich for your budget, then Victoria's Secret ( LTD) will do.