The whole Garner-Affleck family spent a day on the beach in Puerto Rico on Monday. Ben Affleck went shirtless, revealing his multiple tattoos, while Jennifer Garner showed off her postbaby body in a swimsuit. Their girls, Violet and Seraphina, splashed around in the waves while little Samuel hung out on the sand with Jennifer. On Sunday, Jennifer and the kids traveled to the Caribbean island, where Ben has been filming Runner, Runner with Justin Timberlake. Ben and Justin have shared a few scenes together, though Justin's been on location solo as well. He had company from fiancée Jessica Biel, though, when she popped up in a bikini on the beach there late last month.