Shannon Beador and David Beador are reportedly battling it out over custody of their three children, and according to a new report, the kids want to remain with their mom.

Although Beador hasn't spoken of her split for some time, a source claims her children, including 16-year-old Sophie and 13-year-old twins Stella and Adaline, have completely taken her side in the split.

“David’s relationship with the girls is suffering greatly from the split,” a source close to the reality star revealed to Radar Online on Jan. 16.

The children “witnessed first-hand the way that he treated their mom and vowed to never let a man treat them the same way!” the insider explained.

According to the Radar Online source, the three girls are well aware that their father will soon have to pay for what he did to their mother and the way he treated the 54-year-old Real Housewives of Orange County star throughout their marriage. Until then, the insider continued, the girls are doing whatever they can to be there for their mother as her divorce proceedings continue.

Beador announced her 17-year marriage to David had come to an end in October of last year, two years after he infamously engaged in an eight-month affair with Nicole McMackin, who was also married at the time. In her statement, Beador said that a separation wasn't what she had hoped for but noted that she and David would remain committed to parenting their three children as a team.

While the girls have plenty of reason to be upset with their dad, the insider said that Beador “has done her best to not sway their opinion of their father.” That said, she's often broken down into tears and hasn't been able to completely hide her heartbreak from them. Plus, because of David's hectic schedule with his career, his children were never as close to him as they were to their mom.

Beador's marriage troubles have been a hot topic on The Real Housewives of Orange County in recent years, despite their season 11 vow renewal that was held in an attempt to start fresh.

Shannon Beador and her co-stars, including Vicki Gunvalson, Tamra Judge, Lydia McLaughlin, Peggy Sulahian, and Kelly Dodd are expected to begin production on The Real Housewives of Orange County season 13 sometime later this year.