What's a proper response to another dog attempting to mount your dog multiple times and the owner really not doing anything about it?
The owner kind of makes a weak attempt to seem like they're trying, but if I weren't there, they wouldn't intervene at all. I'm asking because I want to make sure that I don't over react next time.
Ideally your dog should tell the other dog that it won't have it. Some times it takes longer than others for this to happen. For some dogs though this never happens
This is such a spot-on response. In addition to another in this thread (stating you are allowed to and should control the situation), it's 100% acceptable for a dog to correct another. Some dog owners see any "bad" interactions as aggressive but dogs can't learn to interact well without correcting each other. Unless it escalates into a legitimate fight, they should be allowed to work it out.