Daenerys Targaryen

Robb was aware of the risk of marrying the Targaryen girl. But he had promised the King only not to let her escape, and he did not intend to. All children she would bear him would be Starks, and their claim to the Iron Throne negligible. Daenerys had started to embrace her new life, doubtlessly helped by the fact that she seemed to feel attracted to Robb. She happily opened her legs for the Lord of Winterfell in their wedding night and soon enjoyed the freedom to walk around Winterfell without men guarding her. Robb knew he could never give her complete freedom, he still had a duty to Stannis. But she didn't resent him for it and was a good wife.

Of course she knew she was only alive thanks to him, so Daenerys never objected to Robb having other girls. Gilly{if sansa_lover=1}, Sansa{endif} and Sera were regular bed companions, and even Margaery, who initially refused him, was driven by her sexual desires and eventually came to his bed, lacking any other partners. {if sansa_lover=1}Sansa{else}Daenerys{endif} and Margaery developed their own, very intimate friendship and started to please each other when Robb was busy with his silver-haired wife.