Jason Merritt, Getty Images
The couple were snapped by the paparazzi sitting side by side in the back seat of a red Mustang convertible near Sagg Main Beach in Southampton, N.Y.
But before you jump to conclusions about a possible reconciliation for the estranged couple, a representative for Lopez told TMZ, "They are not back together. They were just visiting each other and the children."
A representative from Anthony's camp also confirmed that the singer was visiting their children, 3-year-old twins Max and Emme.
"I will always respect Marc as a singer and performer ... He will always hold a special place in my heart as the father of my children," Lopez said in a recent interview. It's good to see J.Lo and Marc are remaining amicable for the kiddies.
Watch Jennifer Lopez's 'If You Had My Love' Video