By Jen Heger - Breaking Celebrity News Assistant Managing Editor

Real Housewives of Beverly Hills star, Adrienne Maloof's estranged husband, Dr. Paul Nassif, is being investigated by the L.A. Department of Children & Family Services over allegations that the plastic surgeon physically abused their three sons, according to court documents, Breaking Celebrity News is exclusively reporting.

According to a sworn declaration from the couple's marriage counselor, Dr. Charles Sophy: "On Sunday, September 16, 2012, Adrienne called and told me about an incident involving Paul and the children that occurred on Thursday, September 13, 2012.  Specifically, Adrienne told me that Paul and the children were in the car when Paul became angry in response to Collin kicking Christian's seat, and that he tried to hit the kids while they were all in the car."

Dr. Sophy had been working with the divorcing parents to try and help them reach a custody arrangement for the children. The respected psychiatrist also described several more instances of Nassif allegedly abusing the kids, including spanking one of the boys on his behind as he was getting out of the bathtub.

Dr. Sophy interviewed the three children, with their parents permission, and he says in the declaration: "All three children appeared anxious and fearful. They are reluctant to share the details of what happened....I further learned that prior to my meeting with the children on Tuesday, a re