Legal Question in Family Law in California

A third party custodian can be appointed if court deems necessary, to fulfill the normal parental responsibilities, a guardian. Guardianship is a court-ordered relationship where an adult is appointed by the court to care for a minor child ("ward") whose circumstances require it, and to make decisions about the child's education, support and maintenance. Parents are the natural guardians for their child and do not need to be appointed by a court. If necessary, the court may appoint a guardian to take care and control of the ward even though custody has been awarded to the parents. A person appointed as guardian must be suitable and qualified and is usually a close adult relative willing to serve. The guardian must always act in the best interest of the ward and make a report to the court at least annually. The guardianship of a minor child terminates when the child reaches 18 years of age. Guardianship is determined in Probate Court.

I don't think Mr. Hulshof answered your question. I think you are referring to a paternity doctrine.

The paternity doctrine is discussed here: http://verdict.justia.com/2013/10/15/california-allows-children-two-legal-parents