Etelvina López, a 33-year old mother of two, is grooming the 400 square-foot nursery room located on the first floor of the headquarters of Mujeres Unidas y Activas (MUA), an Oakland-based advocacy group for Latina domestic workers. She’s preparing for the arrival of the children who she takes care of every Thursday evening. López came to Oakland from Guatemala almost 16 years ago to seek job opportunities. In addition to this job, which pays $15 per hour, López works as…