very unfortunateyet possible, you'd have to go through the same process again dump her and look for another, the math would be on your side by then,(what are the chance 3 are adulterous in a row we'd be getting into lottery levels of probability by then)
Why not just call it quits on relationships for a while before jumping into another situation? By the first incident you would be jaded and that would be amplified by a factor of 2. You'll carry that over if it's unsorted.