Jennifer Garner and Ben Affleck looking for a new home.

"I guess they are looking for a bigger place now," pal Kevin Smith told PEOPLE.

"I saw him last week. Ben came over to watch my movie (Zack and Miri Make a Porno) at the house, and he told me, 'We're having another baby,'" recalls Smith.

"[Jen] is such a Martha Stewart type. She is a perfect mom," he says. "And [Ben] is a great dad, which I found not that surprising, but it's a side of him that I never thought about before he became a dad. He's a great father. He loves that kid of his."

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