We broke up because of a fight and thought we were done, now I find out she kissed a black and wants back in, what should I be doing here?

She didn't screw just sext and 2 peckanon the lips. But she's.. different. Like she's corrupted. What do I have to watch out for now?
We broke up because of a fight and thought we were done, now I find out she kissed a black and wants back in, what should I be doing here?
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