Photo: Kathryn Dennis/Instagram

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DespiteThomas Ravenel‘s claim that his two children withKathryn Dennishave “developmental and behavioral problems” because of her alleged drug and alcohol use, a source tells PEOPLE the children are happy and healthy.

TheSouthern Charmstars share daughter Kensington Calhoun, 4, and sonSt. Julien Rembert, 3, and are fighting over custody.

“A lot has been made about Saints’ development and behavioral problems, but the only issue Saint has are tubes in his ears,” the source tells PEOPLE explaining that his speech was delayed as a result. “His eustachian tubes weren’t draining, so he had his adenoids out and needed tubes in his ears — like lots of little kids his age who have that same problem.”

According to theMayo Clinic, ear tubes are one of the most common surgeries performed on children in the United States and are often recommended for children who have persistent fluid buildup behind the eardrum.

“The hearing deficits can cause a speech delay. It’s not unusual at all, and he regularly sees an ear nose and throat doctor for it,” the source adds. “One can be developmentally delayed and not have a developmental problem. He’s just a little boy.”

And while things between Ravenel, 56, and Dennis, 26, remain contentious, the mom always makes her kids her first priority, a second source tells PEOPLE.

“She wants them to be happy; she wants them to be safe. She really does have their best interests,” the second says. “She was the one who wanted them to see a therapist — to get help, and get counseling.”

Kathryn Dennis/Instagram

Thomas Ravenel, son

In a statement, the former politician’s attorney Kelley Dupre Andrews-Edwards tells PEOPLE, “Mr. Ravenel’s counterclaim against Ms. Dennis is a verified pleading, meaning he swore under oath as to the truthfulness of the allegations made therein. No attorney would counsel their client to verify a pleading unless evidence existed at the time of filing to substantiate his or her claims. Mr. Ravenel’ s sole concern is and always has been the safety and wellbeing of the parties’ children.”

In a new legal filing, Ravenel accuses Dennis of drinking and using drugs while pregnant with their son and alleges that their daughter has issues as well.

“The parties’ oldest child, K.C.R., has developmental and behavioral problems that have required intensive therapy. Father is informed and believes these problems are the result of [Dennis’] lack of bonding with K.C.R. during infancy. … The parties’ youngest child, S.J.R., has developmental and behavioral problems that have required intensive therapy. Father is informed and believes that these problems are the result of Mother’s drug and alcohol consumption while S.J.R. was in utero,” the documents stated.

Dennis’ attorney could not comment.

In a statement, Ravenel’s attorney told PEOPLE they “cannot comment as to the substantive matters of this litigation. However, in regards to the remarks that my client’s allegations are ‘defamatory,’ such allegations do not constitute defamation if they are, in fact, true. Such truth will reveal itself, properly, and in due time, before a court of law.”

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In 2016, Ravenel was awarded full custody, but Dennis has sinceearned back 50/50 custody.

In October, Dennisfiled documentsin Charleston seeking to obtain primary custody of the two children, and on Nov. 6, Ravenel filed a counterclaim.

RELATED VIDEO: Thomas Ravenel and Ex Kathryn Dennis Spend Father’s Day Weekend at Beach Amid Assault Claims

“As [Dennis’] time with the children has increased under their visitation plan, Ravenel alleges that he “has observed marked regression in the minor children’s therapeutic progress,” the new documents stated.

Meanwhile, Ravenel has his own legal issues. In September 2018, he wasarrested and charged with assault and batteryin the second degree after a woman who worked as his children’s nanny accused him of sexual assault. A judge foundprobable cause for a trial, though a date has yet to be set.

Ravenel denied the allegations through his lawyer at the time, as well as a separate sexual assault accusation from a woman he met on Tinder in 2015.

Ravenelis not returningfor the next season ofSouthern Charm.

source: people.com