Robert De Niro has spoken fondly of his seven children over the years — but hasn’t sugarcoated how hard parenting a slew of kids can be. The Oscar winner welcomed his first son, Raphael, in 1976 with his then-wife, Diahnne Abbott. De Niro also adopted the actress’ daughter, Drena, from a previous relationship. Following his split from his Taxi Driver costar, De Niro also became the father of twin sons Julian and Airyn with model Toukie Smith. Their children arrived via surrogate in 1995. The Irishman star went on to marry philanthropist Grace Hightower two years later. They...