The 38-year-old Oscar nominee said that his family is close, and the passing of his father, Charles, hit them all pretty hard.
"Let's face it: It's probably not easy for her, by the way, to be living with her son. It's life. And right now, two years after my father's death, this is where we are," he said on his living situation.
"My family is very close, and my dad dying was brutal for all of us. It was a schism, and its aftershock has not stopped. And we need each other. So here we are but don't get me wrong. It's not without complications. It's not like I live in a compound and she's in the guesthouse. No. She's in the next room. But here's the thing: She's a cool chick. We can hang, and she can roll with the punches. If that wasn't the case, there's no way."
Cooper also told the magazine he hopes to be a father one day. "I saw how much joy fatherhood gave my own dad," he said. "So I hope it's part of my journey. You go through stages in your life, and fatherhood seems like a natural stage."
After acclaim for his role in David O'Russell's blockbuster hit "Silver Linings Playbook," Cooper will follow up with the comedy "The Hangover Part III" and another O'Russell project titled "American Hustle."