Privacy/boundaries

I’m curious what others are OK with? Recently there was an instance where I had been invited to do a meet and greet for a booking. I ended up staying there much longer than I normally do (over an hour). They were very thorough with the information which is fine. After staying there for over an hour, they had mentioned that another Rover was coming over for a meet for different dates. Apparently this specific sitter could not do every single day they were asking, which is why they set up a meet with me for the one date the other sitter couldn’t do. Normally, I don’t like doing that because it can get messy pretty quick when there’s two different sitters. I had already been there for an over an hour so I just decided to take it. They were very nice people. The pets did seem like quite a bit of work, but that’s fine. I started the stay and all of a sudden I get a text from a random number. I realized it was the other sitter. I’m unsure of how they got my number. The owner never asked if it was OK to send my number to them. Anyways, curious what you think cross is a boundary and if you ever experienced anything like this? I guess it’s not that big of a deal but yeah. Idk