in one of the most upscale neighborhoods in the san francisco bay area. >> i mean, this is something i would never expect here. it's just -- i think it's just preposterous. >> heidi lived just four doors down from her employer. she couldn't help but notice the young girl wearing the same threadbare jogging suit every time she saw her. >> the thing that attracted my attention was she was washing the car every day. she came out to wash this car from top to bottom every single day, whether it was raining or cold or warm. we thought what a strange thing. why would some young girl have to come out and wash a car every single day? >> lily says washing and waxing the car at 6:00 am was only a fraction of her responsibilities. every day began with the feeding of the 7-year-old twins, who were not allowed to carry their books to the car.