Poor Shannon! The Real Housewives of Orange County star's estranged husband David Beador is still rubbing his rebound romance in her face — and even the couple's kids are upset, a source exclusively told Breaking Celebrity News.

On Shannon's first Valentine's Day without her husband of 17 years, David's much-younger girlfriend Lesley Cook, 34, took to Instagram to show off their steamy date.

"Happy Valentine’s Day to the most kind, funny, motivated, loving man! The sky is more blue & my coffee tastes better with you in my life," she gushed in a caption for a photo of red balloons.

Though David seems happy and carefree as can be, his daughters Sophie, 16, and twins Stella and Adeline, 13, were "really upset" to see Lesley's PDA-packed posts, a source told Breaking Celebrity News.

Meanwhile, Shannon is "hurt and confused" that David moved on so quickly and publicly, the source claimed.

Breaking Celebrity News was the first to exclusively report that David, 53, began dating Lesley in December, only three months after Shannon, 53, announced their separation.

As fans know, the RHOC star couple's marriage started to crumble when David infamously cheated on Shannon in 2015 with a family friend.

The former couple will return to court to fight over spousal support on March 12. A mediation session to work out custody issues failed last month.