Lopez, who is mom to twins Emme and Max, and Rodriguez, who is dad to daughters Natasha and Ella, combined their families for a casual "Sunday funday" outing.
"Happy Sunday everybody!! #sundayfunday [photo by] @lacarba," Lopez, 47, captioned a photo on Instagram of the group.
Rodriguez, 41, posted a picture on his own account of himself cozying up to Lopez.
"Happy Sunday! #downttime," he wrote.
Lopez shares Emme and Max with ex-husband Marc Anthony, while Rodriguez shares Natasha and Ella with ex-wife Cynthia Scurtis. Lopez and Rodriguez were first linked in March, and confirmed their relationship the same month.
"[Their kids have] really bonded and become good friends," a source told E! News in April. "A-Rod's older daughter, Natasha, is like a big sister to J. Lo's twins."