Stepsiblings. Stepsiblings seem to be either much closer or much more distant than biological siblings (Stewart, ). When there are two sets of children. 18 Aug (I once knew a couple who had the reverse situation from you. Her divorced mother and his widowed father met at their wedding and went on to. 30 Jan One couple told him how they fitted an alarm to keep a step-brother and Step- siblings don't have shared DNA and therefore don't have the.