lala123,
For your information i have the same case with you before, i was hired to work as as live in caregiver to my jewish employer's 15years old son because he is still considered as a minor,my employer and his wife are always came home late at night because of there catering business that they need somebody to watch over there teenager son ,yes its okey they can sponsor u as live in caregiver, i was working with them for 2years and 3months, i am now an open work permit category and waiting for my PR approval.CHEER UP ;D