Jennifer Lopez continues to ramp up her romance with Casper Smart. Fresh off their recent coziness in Miami and New York (left), J.Lo, 42, and her 24-year-old backup dancer beau of three or so months soaked up the sun on a Malibu beach on Sunday with her 3-year-old twins, Max and Emme (see the pics here). The couple smiled and kicked back during the sand-and-surf sojourn, with Jennifer flashing her quarter-bouncing abs and Casper getting a workout by chasing around the kids. At one point, he hoisted Emme over his head, much to her apparent delight. For those keeping track, it's been a little less than seven months since Lopez called it quits with Max and Emme's dad, Marc Anthony, after seven years of marriage.