House sitting - dog possibly urinated in their bedroom?

Hello!

This is the third time I have house sat for this family, they are super awesome and their dog is the best. However, this afternoon while I was doing basic cleaning up I thought that I smelt urine coming from their master bedroom. I popped in and was trying to pinpoint the smell but could not. From the way the dog was acting when I was in there I believe she had an accident.

What can I do?