Heidi Montag and Spencer Pratt haven’t even been married a week, and there’s already talk of babies!

“Heidi wants four boys,” new sister-in-law Stephanie Pratt told Usmagazine.com at the grand opening of Catch Boutique in L.A. Thursday. “Four Spencer Pratts!”

Does The Hills star think Montag will make a good mom?

“Yeah, she’s really good with our niece,” Stephanie told Us. “They’re [both] kid lovers.”

Stephanie, who said she had never been to a wedding before their Saturday nuptials, thought the ceremony was wonderful.

“It was the most — I didn’t think they could be that beautiful,” she told Us.

Her favorite moment was when she — not Montag — walked down the aisle.

“For me, it was walking down the aisle — it wasn’t that long of an aisle — and I felt so nervous,” she said. “I had to walk slow, but I was running down it and crying. I was seeing my brother laugh at me because I could not keep it together, and at the end he was laughing. I’ll never forget that.”

Even Montag’s in-laws — Skip and Janet Pratt — got choked up.

“They’ve always loved Heidi,” she said. “My mom was very emotional. He’s her only boy.”

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