Revenge cheating just makes you the asshole too and solves zero problems. Walk away instead.
It also just gives them the perfect excuse to flip the script and play the victim. Keep your own standards high and cut your losses.
Accountability is part of real healing; without consequences, the hurt learns nothing and love loses its integrity.
Revenge is a distraction from virtue. The only real remedy is to preserve your own soul while demanding consequences that fit the harm.
Sometimes a firm response teaches lessons faster than patient repair; without consequences misdeeds multiply and your own honor erodes.