@legendvictoria You said it’s a long sit so allowing some visitors while the sitter is there could make sense in this situation ( but only if you are comfortable with it ) . That could mean that the sitter won’t get lonely and will be spending more time at home with your pets .
A video call will help you to discuss is the BF going to be staying the whole time or just occasionally?
If the sitters boyfriend is going to be doing sits with her regularly you could suggest that she changes her profile to sit as a couple and adds his details .
There was another thread where the sitter left the sit early on but left the BF there. He didn’t communicate with the hosts and they had no way of contacting him. https://forum.trustedhousesitters.com/t/a-couple-that-agreed-to-sit-however-she-left-the-sit-halfway
So definitely discuss who will
be taking responsibility for the sit and communicating with you and ask for contact numbers for both of them.