Only on the "CBS This Morning" podcast, clinical psychologist Daphne de Marneffe talks her new book "The Rough Patch: Marriage and the Art of Living Together" with CBS News correspondent Reena Ninan. They discuss the many challenges couples face such as money, alcohol and drugs, the stresses of parenthood, sex, extramarital affairs, aging and dealing with elderly parents. Marneffe touches on the importance of emotional communication.