Kelly Clarkson scored a huge victory in court on Monday, after the judge awarded her primary physical custody of her two children with estranged husband Brandon Blackstock.

Now, the 43-year-old music manager seeks $436,000 in monthly spousal and child support for River Rose, 6, and Remington Alexander, 4.

“Brandon’s been equally unreasonable in his requests for child and spousal support, as well as attorney fees,” a source shared.

“Kelly’s offered to pay for all the kids’ expenses, but Brandon seems to think he is entitled to and needs $301K in spousal support and $135K in child support per month.”

“Additionally, he’s already asked for $2M for attorney fees when he’s the one driving up the cost of the divorce with seven attorneys just representing him alone,” the source added.

Clarkson filed for divorce in June, citing “irreconcilable differences” after seven years of marriage, and the divorce proceedings are still ongoing.

She recalled feeling that her marriage “isn’t happiness for both of us,”and that she and Blackstock “deserve better.”

“As Kelly has said, her first priority in all of this is to take care of the kids and all the hearts that are involved in this divorce,” another source shares.

“It’s been a hard time for everyone, but Kelly’s pleased with the court’s ruling regarding custody.”

“Divorce is hard and it gets tense for most couples going through it. But Kelly’s primary focus is on doing the best she can to protect the kids,” the source added.

“In this case, she had to fight for them since Brandon and his attorneys were making unreasonable requests.”

According to the source, Blackstock wants the children to go “back and forth” from Los Angeles to Montana or reside in Montana.

The court, however, ruled found that the children “have not resided in Montana”, and ruled that Blackstock must travel to L.A. to see the children for “visitation and parenting time.”