The feds busted a Bronx woman Monday for allegedly running an underage prostitution ring out of her apartment — where her own three children reside.

Darlene DeLeon and five other people were hit with sex trafficking charges Monday.

A whistleblower told the Administration for Children’s Services “that lines often formed in the hallway as men waited to enter the apartment,” prosecutors said.

DeLeon and her school-age children resided in one of the apartments used by alleged madam Maria Soly Almonte to sell girls as young as 13 years old for sex.

One defendant, Vetthya Alcius, remains at large.