Planning to use my aunt/manager as a recommender! Potential Problems? Please advise!

I worked for the family business during the summers of my undergrad school years. After graduating I worked for a few years at other companies and since June, I've been back at the family company working for my aunt.

It's a totally legitimate job and I do work relevant to my intended field of study. The company has a website that clearly states that it is a family business with "three generations of family involvement."

I'm worried that the adcom won't take the recommendation or my job seriously if they just briefly look it up and see the last names match up. It is my only experience relevant to the field. I would greatly appreciate suggestions for the best course of action.