The son and daughter of Rob Reiner and Michele Reiner stunned onlookers after being seen doing something unexpected at the seaside shortly after their parents’ de-aths

Romy Reiner and her brother Jake Reiner stepped out for a walk on the beach in their first joint sighting since the death of their parents.

On Monday, the siblings put on a united front outside a Malibu, Calif., beach house where they’ve reportedly been staying since their parents, Rob and Michele Reiner, were tragically murdered earlier this month.

In exclusive photos obtained by Page Six, the siblings appeared downcast while walking side-by-side.

They were joined by Jake’s girlfriend, Maria Gilfillan, and another female.

At one point, the group was photographed standing in a circle and talking.

Romy wore a black sweater, jeans and a hat, while Jake wore a T-shirt, gray shorts and a hat for the outing.

Earlier in the day, Romy was seen being comforted by loved ones outside the home.

Romy, who lived across the street from her famous parents, was first seen outside the beach house on Saturday.

The date marked her 28th birthday, and she spent it surrounded by loved ones.

Jake joined his sister at the property on Sunday afternoon and was seen taking a somber stroll on the beach with his girlfriend.

The 34-year-old and Romy have been staying under the radar since their parents were murdered at their Brentwood, Calif., home on Dec. 14.

Romy discovered Rob and Michele’s bodies after she went to check up on them when they missed a massage therapy appointment, sources told The Post.

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The legendary director, 78, and Michele, 70, were found with multiple stab wounds to their bodies, according to their death certificates.

According to the Post, the couple’s youngest son, Nick, was being investigated as a person of interest ahead of his arrest later that evening.

The 32-year-old, who has a past of violence and substance abuse, was reportedly diagnosed with schizophrenia and had his meds changed leading up to the killings.

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