There is, however, a limit at which forbearance ceases to be a virtue.

Patience is a virtue with an edge to it, and past that edge it turns into something else. Continuing to absorb bad treatment stops being generosity and becomes permission, since the other person learns exactly what they can get away with. Knowing where your limit sits has to happen before the moment arrives, because in the moment there is always one more reason to let it pass. Endurance is not the same as goodness.

Decide now what you will not accept a fourth time, and say it out loud to somebody. Once it is crossed, act rather than warning again. Tolerance with no end is not being read as kindness.