• Jennifer Lopez and her daughter, Emme, attended Jennifer Klein's "Day of Indulgence" event Sunday
  • Lopez reportedly picked out birth flower necklaces for Affleck's daughters
  • The singer reportedly planned to gift them to Violet and Seraphina on Sunday night at Affleck's 49th birthday gathering

Jennifer Lopez reportedly gave Ben Affleck's daughters gifts on his birthday, a report says.

The 52-year-old singer attended an event with her 13-year-old daughter Emme at producer Jennifer Klein's home in Los Angeles' Brentwood neighborhood Sunday. While there, she reportedly picked up some jewelry for Affleck's daughters, Violet, 15, and Seraphina, 12, whom he shares with ex-wife Jennifer Garner, People reported.

"When she stopped by the Made by Mary jewelry station, she and Emme picked out several 'birth flower necklaces,' including two for Ben's daughters," an unnamed insider told the outlet.

The "On The Floor" singer reportedly planned to give them to Violet and Seraphina at Affleck's 49th birthday gathering Sunday night.

Lopez shares Emme and her twin brother Max, 13, with ex-husband Marc Anthony, 52. Affleck is also dad to son Samuel, 9.

Lopez was also accompanied by her close friend and "Hustlers" producer Elaine Goldsmith-Thomas for Klein's annual "Day of Indulgence" event. Diane Warren and Laverne Cox were also in attendance, and they reportedly raved about Lopez's look in her photos from her recent vacation with the "Justice League" star in France.

"J.Lo had a huge smile on her face at that," an anonymous party guest told People.

No details were provided about Affleck's birthday celebration with Lopez and his kids Sunday night. However, the two were photographed separately earlier that day.

Aside from Lopez's visit to Klein's house, she was also seen out and about with her son, Max, while Affleck stepped out with his three children. In photos obtained by TMZ, the mother and son visited the Beverly Hills Hotel in Los Angeles. They were accompanied by a group of bodyguards, the outlet noted.

Affleck and Lopez have been spending time with each other’s kids since rekindling their romance earlier this year. Last month, the couple was spotted walking around Hollywood's Universal Studios with her twins Max and Emme and his son, Samuel. The group strolled through Springfield, the park's "Simpsons"-themed attraction, while accompanied by their bodyguards.

A week later, Affleck spent some quality time with two of his kids, Seraphina and Samuel, and Lopez's daughter Emme without the singer. The actor took the three children on a trip to Universal CityWalk in Universal City, California.

A source previously told People that Lopez's kids were "onboard" with moving from Miami to 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
LOS ANGELES - FEBRUARY 9: Actor Ben Affleck (L) and his fiance actress/singer Jennifer Lopez arrive at the premiere of "Daredevil" at the Village Theatre on February 9, 2003 in Los Angeles, California. Kevin Winter/Getty Images