Is it appropriate for a dog sitter to bring a significant other over without asking?

We had a dog sitter stay over this past weekend, and have the Ring camera that I occasionally check on. On the camera I saw that our dog sitter had her (I’m assuming) boyfriend come to our house one of the days, and he stayed for most of the day. We do not know him, and she did not ask us if this would be alright. I am a little upset about this and am wondering if anyone else had a similar experience?