can anything be done?
This seems unlikely, it seems your parents have a long standing and friendly relationship with the owners which quite possibly influenced you getting employment there. But even if it didn't you cannot stop the owners and your parents from talking to each other about you.
What you can do is tell your parents you don't like it and you'd appreciate them not getting involved in conversations with the owner about your work, and tell the owner you'd rather not be getting an earbashing from your parents every week so if they don't mind keeping your working life a bit more between you and them it would be great.
Quite often just letting people (especially those who love you) know that you're uncomfortable with their behaviour is enough to trigger a change. Sometimes works with total strangers as well.