You agree to let your stepMOM stay with you and your wife for a few weeks whilst she gets back on her feet after a messy divorce. It's true that it'll be awkward, but you can't deny that your looking forward to spending time with your estranged stepMOMMY, even if your wife doesn't really like her much, and, after discovering your wife is struggling to get pregnant, your stepMOM worries that you are unhappy in your marriage. This revelation leads to an unexpected twist of events when you suddenly realise yourself just how miserable you really are and you make a forbidden move on your stepMOMMY.. the encounter kicks off a taboo love affair right under your wife's nose.. what a nightmare you are in.