Jennifer Lopez shared a photo on Instagram on Friday of her beau Alex Rodriguez with their respective children. "This," the "World of Dance" judge captioned the image with a heart emoji. The picture shows Rodriguez with his daughters -- Natasha, 12, and Ella, 8 -- and Lopez's twins Max and Emme, 9. Rodriguez turned 42 this week, while Lopez celebrated her 48th birthday. The couple have been dating since March.