Clay Aiken revealed only this week that he is gay, and now his baby son's uncle, music producer David Foster, is revealing new details about family life at home.

David's sister Jaymes gave birth to Clay's son, Parker, in August. "They've found a way to make it work for the three of them," he tells ET Canada in a new interview. "It's the perfect, perfect situation -- they're going to co-parent and they're best friends."

David was there from the beginning of his nephew's life: "I was there for the birth," he adds. "My sister just roared through the delivery, no [whining], like, boom, let's have this kid. And she did, and the baby is beautiful, and all is good."

Regarding talking to the press about his sister and her family, David said, "I talked to Jaymes and Clay this morning, and I said, 'What's the parameters?' and basically they just said, which I [know] is true, 'One sentence and then move on.'"