My ex has a new girlfriend and I don't want my kid to meet them, how do I handle that?

Recently separated and divorced families often struggle with the issue of a new significant other.  

Experienced Bay Area family law attorneys recommend to clients to work out a plan prior a conflict.  Here is some sample language to help smooth out the process: "neither parent will introduce our child to new significant others without prior notice of at least a week to the other parent. Both parents agree that they shall create a plan to determine (1) when our child will be introduced to new significant other, (2) where our child will be introduced (a park or restaurant can be easier), and (3) an appropriate time period in which our child can adjust prior to the new significant other sleeping over.