Ben AffleckandJennifer Lopezcan’t let each other go.

The sweet interaction comes days after Affleck celebrated his 49th birthday on Sunday with his family and Lopez, 52.

The actor spent the day with his kids — daughtersViolet, 15, andSeraphina, 12 and sonSamuel, 9 — before meeting up with Lopez and her twins — Max and Emme, 13 — in the evening.

“Jennifer had a cake for him. Ben is not one for big celebrations, so he thought it was perfect,” a source later told PEOPLE. “It was exactly what he wanted.”

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Affleck shares his three kids with ex-wifeJennifer Garnerwhile Lopez shares her twins with ex-husbandMarc Anthony.

BACKGRID

Ben Affleck and Jennifer Lopez have a passionate kiss

The couple, whorecently vacationed in St. Tropez for Lopez’s birthday, are getting serious as Lopezplots a movefrom Miami to Los Angeles, where Affleck is based. An insider previously told PEOPLE that Emme and Max are"onboard with starting fresh in Los Angeles."

“They are slowly getting to know Ben,” the source added. “Everything seems to be running smoothly. It’s very obvious that Jennifer is serious about Ben. She hasn’t looked this happy for a long time.”

Ben Affleck and Jennifer Lopez have a passionate kiss

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A source told PEOPLE in May that their relationshipis different this time around. “Time has passed, and they are each in a different place with children,” the insider said.

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source: people.com