In the interview, in defending the practice of unrelated adults sleeping in the same bed with young children as "healing" and "loving" ("It's what the world needs now!"), he made specific mention of how he slept in the same bed with Macaulay Culkin, his brother Kieran, and an unidentified Culkin sister (probably ).
This is what we now know about Kit Culkin, their father, according to an interview with Macaulay by Baba Wawa aired November 17, 2000:
BARBARA WALTERS (VO) Although in the “Home Alone” films, he had a loving, if occasionally absent, family. In real life, he says his father was a constant and controlling presence. Culkin was the third of seven children. His mother stayed home with his brothers and sisters while his father traveled with him from movie set to movie set. He managed his son’s career and is said to have alienated most of Hollywood with his rages and excessive demands.
(OC) Tell me about your mother. Tell me about your father.MACAULAY CULKIN I have always really, really loved my mother so much. She’s really a wonderful woman. I don’t know. My father was really very good at breaking people’s spirits and holding them down. And he did that to all of us, including my mother.
BARBARA WALTERS Your father was described as the father from hell.
MACAULAY CULKIN Oh, yes, yes. I—I remember that. I remember him sitting on the phone screaming his head off at God knows who. And I mean that was—that was—that was a daily thing. And it was just the way my father was. So I just kind of accepted it. I mean, you have to remember that I was only nine, 10, 11, 12. I—I had no control over it.
BARBARA WALTERS What was he like with you?
MACAULAY CULKIN He was the same way on the phone with these people in Los Angeles as he was with me and the rest of my family. It’s very weird, because I know whatever I say about him, he’s going to try to contradict everything I say. But, you know, yes, he was—he was very—he was very hard on me. And he would deny me certain things in my life that I enjoyed. Like if he felt I wasn’t trying hard enough or something like that, he wouldn’t let me play basketball even though I liked doing it. My brother and me slept on the couch. We even have our own bedroom. I mean, I was—I was making—forget about how much money I was making. But I was sleeping on the couch. And...
BARBARA WALTERS Why?
MACAULAY CULKIN I think it was just a way of him wanting to break my spirit. He wanted to—me to know and my brother to know that he was in charge. And that if he didn’t want us to sleep on a bed, we weren’t going to sleep on a bed.