Get EVERY verbal "promise" in WRITING! And have both parties sign it! Even if a parent advises that you don't need to. You're family. It's too easy for the owner to say, "That's what you keep saying," regarding a promise she made to you about a promotion or details you'd be in charge of (like being in the interview when hiring the person that will be sitting next to you doing the same job as you). In other words, she forgot. I didn't. Because of that I had to resign (for my sanity) after 5 years.