I wish to ask for legal advice pertaining an issue of my fiancee's only son and his recalcitrant live-in partner.
Their relationship started over 12years ago but they have broken romantic ties 7years ago. They were never married however, they begot a son and have decided to continue to live together in order to provide a nuclear family setting for the child, now 8years old.
Recently, my fiancee expressed his desire to leave their household but the mother of the child threatened a sole custody battle for his son should he do so.
I would like to ask what steps should he take in order to assure legal joint custody of his only son.
Thank you for your time.