January 25, 2015 02:00 PM

Ask Jennifer Lopez what role she most cherishes and the answer’s a no-brainer: being a mom.

“Kids make you believe in all kinds of things, like how anything is possible,” The Boy Next Door star – and mother to 6-year-old twinsMax and Emme — tells PEOPLE in this week’s cover story.

Which is why she’d be thrilled to add to her brood, even at age 45. “I don’t know if it’s in the cards for me because of my age, but I would love to have another baby, to be blessed one more time,” says Lopez, who is currently single.

John Russo

Better yet, why stop at one? “I’d love to have twins again,” she says. “I was thinking about that last night when I was laying in bed with Emme. I was just loving the moment. I don’t know that it’s in the cards, but you never know!”

No matter what, Lopez, a refreshingly hands-on mom, already feels “blessed” with Max and Emme.

“It’s unconditional love,” she says. “I know everybody feels this way about their kids, but I just feel like they’re super special. I can’t wait to see what they do, and I feel like my job is to not mess them up too much.”

So far, so good.

John Russo

For more of our exclusive interview, and to see inside Lopez’s amazing L.A. home, pick up the latest issue of PEOPLE, on newsstands now.

— Elizabeth Leonard

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