Article continues below advertisementJanuary Jones left her undergarments at home.The actress, 47, flashed her nipples in a white satin slip dress on Tuesday, August 5.Article continues below advertisementSource: @januaryjones/InstagramJanuary Jones flaunted her toned body in a bikini last week.Jones ditched her bra in the sultry ensemble, featuring lace trim along the top and bottom hem. She layered the tiny frock with a chunky cardigan from The Knotty Ones, blue baseball cap from Conner Ives and gold chain necklace.