Second chances are fine. A fifth chance for the same thing is a pattern you’ve agreed to.

One repeat is a mistake and five is information. Somewhere between those, the thing stops being something that happened to you and becomes an arrangement you are participating in, because by then you know what to expect and are choosing it anyway. Nobody decides this out loud. It accumulates through a series of reasonable individual forgivenesses, each of which made sense on its own.

Count the actual number of times rather than how it feels. If it is more than a couple, the next conversation is about the pattern and not the incident. You can forgive somebody and still change what you give them access to.