A Baby for Jennifer Lopez and Boy Toy Casper Smart!

Jennifer Lopez is so smitten with her new love, Casper Smart, they are already talking babies, Star has learned. "She's seen how great Casper is with her twins, Max and Emme, and she knows he'd be a terrific father if they had a baby of their own to add to the family," a source tells Star. "She and Casper are so madly in love."

OK! NEWS: JENNIFER LOPEZ AND CASPER SMART TWEET ABOUT LOVE

Meanwhile, the insider notes that J.Lo's estranged husband, Marc Anthony, is sure to be furious about Jennifer's plan to have her 24-year-old backup dancer's baby, the source notes. "Marc is fuming about her relationship with Casper and how serious it's getting so fast. Tensions between Marc and J.Lo are worse than ever."

OK! NEWS: WHY JENNIFER LOPEZ WENT COUGAR WITH CASPER SMART

But Jennifer is determined to build a family with Casper — and is even currently shopping for a new mutimillion-dollar apartment in Manhattan to serve as their primary residence. "She's living with Casper now in L.A. but looking to buy a place in New York City with plenty of room," says the source.

FOR MORE ON JENNIFER AND CASPER'S BABY PLANS, PICK UP THE NEW ISSUE OF STAR, ON SALE NOW!