I work remotely, and my sister works at one of the company's main offices. The team in the office is very negative and has an "Us vs them" mentality when it comes to remote workers. My sister tells me that they are constantly complaining about the remote team.
Lately, it's gotten much worse, they are openly talking poorly about me by name which adds a lot of stress to my life even though I shouldn't "Know that". Every call I get on with them, I am just anticipating that after the call is over no matter what I say they will be talking trash, as confirmed by my sister.
They know my sister and I are related and don't even care. This is even one of the higher-ups in the company participating in this behavior.
In addition to this, they are very negative in emails, and this is all adding a lot of stress to my position of 10 years. Is it appropriate to talk to my boss about what I know from "the office" due to what my sister tells me?