By Sean McPolin A millionaire English teacher and author who shared all about her polyamorous marriage has received several comments about her “sad” life, which sees her and her husband open up their relationship to others. From horrible sex at a down-beat motel to being enraged by her husband of ten years wanting to sleep with his ex, Molly Roden Winter has told all about the Brooklyn pair’s secrets in a new book. The 51-year-old has two children with her partner Stewart and has recently chronicled the highs and lows of their marriage in her new bestseller More: A Memoir of Open Marriage. How…