On this list are commonly used vocabulary relating to a family. I also included words such as 'half-sister', 'step-mom' etc, and included the translations on those since they were not the focus of my family unit.
Feel free to tweak it to your needs! It went along nicely with my story scripts, which are free as well! :)
Spanish Family Vocabulary and Descriptive Vocabulary ‘Unfair Game’ Review
Free Fill in the Blank Story Script: La Familia