Baby, it’s cold outside. So skip the party, stay in with your sweetheart and smolder in these sultry lounging looks that are sure to keep things cozy and warm.

Natori white satin bra, $56. Sassybax full black panties, $52. Saks Fifth Avenue. Platinum and 18-karat yellow gold necklace containing eight Burma rubies weighing 37.91 carats and round brilliant marquise diamonds. Platinum and 18-karat yellow gold ring containing one oval Burma ruby weighing 10.31 carats and modified baguette. Platinum and 18-karat yellow gold oval ruby and diamond bracelet with 30 oval rubies weighing 30.87 carats and 330 round brilliant diamonds. Prices upon request. Molina Fine Jewelers, 602.955.2055.

Chantelle black satin bra, $76. Alexander McQueen black-and-gold jacquard wide-leg trousers, $1,365. Natori black silk robe, $117. (In background: Wacoal tan- and black-lace bra, $52; Sassybax panties, $52.) Saks Fifth Avenue. Yves Saint Laurent black patent platform pumps. Barneys New York.

Akris felted leopard dress, $2,560. Saks Fifth Avenue. Yves Saint Laurent black patent platform pumps. Barneys New York. 18-karat white gold earrings with 15.5 carats of 90 round brilliant-cut diamonds. Platinum solitaire asscher-cut diamond engagement ring of 10-carat colorless diamonds. Prices upon request. Molina Fine Jewelers, 602.955.2055. Stylist’s own tights.

Cosabella tan satin and black lace bustier, $150. La Perla black lace panties, $102. Neiman Marcus brand cream-colored cashmere cardigan, $198. Badgley Mischka crystal earrings, $250. Neiman Marcus.

La Perla leopard cami, $213. La Perla black hipster panties, $102. Gucci sand-colored wool coat, $3,950. Gucci camel-colored pumps with gold button detail, $495. Fragments black-and-gold chandelier earrings, $350. Neiman Marcus.

Alaia black sleeveless ruffled dress with metallic silver threading, $3,780. Alaia black suede booties with ruffled trim, $1,755. Barneys New York. Portolano black leather gloves with lace trim, $198. Saks Fifth Avenue.