An 18-year-old woman accused of pretending to be twin 12-year-old boys and simultaneously dating two adolescent girls will undergo a psychiatric evaluation to determine her competency to stand trial in San Mateo County Superior Court.

Lakesia Michelle Mason pleaded not guilty in March to 13 counts of lewd acts upon a child under the age of 14 for her alleged relationships with a 13-year-old girl and an 11-year-old girl.

Friday in court, Mason's defense attorney raised questions about Mason's competency to stand trial for the alleged crimes.

According to the state penal code, a person cannot be tried or punished for a crime while that person is mentally incompetent.

Superior Court Judge Craig Parsons today assigned Mason to undergo a psychiatric evaluation by two court-appointed doctors. Criminal proceedings against Mason are suspended pending the outcome of those reports.