Dr. Christine Martone on Monday found that 40-year-old Laurel Michelle Schlemmer should be treated at a state institution to determine if she can stand trial in the future.
Detectives say the woman told them she tried to drown her 3- and 6-year-old sons by sitting on them in the tub after a third son left for school. They say she told investigators she heard "crazy voices" telling her to push the boys underwater.
Judge Jeffrey Manning also on Monday issued a gag order in the case, at the request of Schlemmer's attorney. That means no one involved could comment on the competency finding.