Rob Reiner’s son Jake seen for first time since dad and mom’s grisly murders

Jake Reiner stepped out for a shopping date with his girlfriend, Maria Gilfillan, in the actor’s first public sighting since the brutal deaths of his father and mother, Rob and Michele Reiner.

The 34-year-old and Gilfillan were photographed holding hands while strolling in Malibu, Calif., on Saturday.

They walked around keeping straight faces, and Jake was seen talking on the phone at one point.

Jake kept it casual for the outing, sporting a blue button-up, jeans, a hat, sunglasses and white sneakers.

As for Gilfillan, she wore a green sweater, a gray jacket and jeans.

She also accessorized with a tan shoulder bag, beige boots and sunglasses.

Rob and Michele were tragically murdered at their Brentwood, Calif., home on Dec. 14

According to their death certificates, they died within “minutes” of being stabbed several times.

Their bodies were later cremated and handed over to Jake.

Insiders told The Post that Rob and Michele were found by their daughter, Romy Reiner.

The 28-year-old reportedly told officers that her brother Nick Reiner, who has a history of substance abuse and violence, should be a person of interest.

Nick was arrested later that evening in downtown Los Angeles after reportedly leaving a bloody trail of evidence at the Pierside Santa Monica.

The 32-year-old was hit with two separate charges for first-degree murder and is currently behind bars at Twin Towers Correctional Facility, awaiting his Jan. 7 arraignment.

Nick, who was allegedly diagnosed with schizophrenia ahead of the murders, is reportedly planning to plead not guilty.

The screenwriter had gotten into a loud fight with Rob at Conan O’Brien’s Christmas party the day before the killings.

At the bash, the legendary director allegedly said he was “afraid” of Nick and thought the latter was capable of “hurt[ing]” him, the Daily Mail reported.