HOW SHE FELT ABOUT HAVING TWINS.

“I was in denial until I went to the doctor and she said, ‘Oh my God! There’s one baby, see the heart beating? And there’s the other one!” she told the magazine. “I knew twins ran in my family, and we always joked, ‘Who do you think is going to have the twins?’ So, of course, all my sisters were like, ‘It’s you! It’s you!’ “

BODY OF WORK.

Lopez, who has shed most of the nearly 50 lbs. she gained during pregnancy, says she’s not in a hurry to get her old shape back: “Not right now. I even play with my little leftover belly, you know?”

WHY SHE DIDN’T BREAST-FEED.

“My mom didn’t breast-feed, and I think that was the thing for me. You read and figure out what’s the best thing for them.”

IF THIS IS THE HAPPIEST TIME OF HER LIFE RIGHT NOW.

“Absolutely. Having children is the biggest thing that can happen, I think, to a woman. You win an Oscar, get nominated for a Golden Globe — you know, whatever things you think are big — I can’t even think of anything that can match the actual miracle of giving birth and having your own child. It’s beyond anything you could ever imagine.”

WAS IT TOUGH TO CONCEIVE?

“It was natural. We didn’t do in vitro, which I know was reported. Everybody assumed that because we had twins. I wanted to have a baby, but I’ve always said exactly what I said all those years they asked us since we’ve been married: ‘Well, when are you guys gonna have some kids?’ ‘When it happens naturally, I guess!’ And that’s when it happened. It was a surprise to us.”

WAS SHE WORRIED IT MIGHT NOT HAPPEN?

“You start getting older, you think to yourself, maybe [having kids] is just not meant for me. I knew there was nothing wrong with me. I knew that I could. Deep down, I really wanted it badly.” MARC: “It never even entered my mind that it would never happen.”

HOW IS MARC ON DIAPER DUTY?

“He’s the best. He puts the help that we have to shame.”