I have a pretty solid professional relationship with my boss. We also get along well personally and share some things in common that don't relate to work that we talk about. I have a suspicion, but am not sure, that my boss doesn't yet have plans for Thanksgiving.
It's going to be a moderately sized crowd with a mix of adults and kids. So my boss wouldn't be very much on the spot, but also not left out. My boss doesn't have young kids to bring, but does like kids in general.
I have no issues with my boss seeing my home and personal living space.
I can't really think of any downsides. But I'd like to hear what others have to say.