In the custody settlement, the singer agrees to increase the monthly payments from $15,000

Britney Spears‘s custody settlement with her ex Kevin Federline, in which he retained sole custody of the couple’s two sons, came at a price.

A source close to the singer confirms she’ll now pay Federline $20,000 a month in child support, an increase from $15,000.

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Federline’s lawyer, Mark Vincent Kaplan, also demanded and received $250,000 for his work on the case, the source adds.

“All Britney was seeking was a formalization of her increased visitation that she’s obtained over recent weeks, and the additional overnight,” the source said. “She won both of those requests.”

Spears, who is represented by lawyer Laura Wasser, currently sees her sons twice a week with one overnight. The source adds that she will get an additional overnight by year’s end, barring any setbacks.