A very important question: Did she agree to be transparent with you now? Without that in place, OM will keep pursuing, and the odds are VERY high (90%+) that the affair will re-ignite.
She should also change her cellphone #, and any other means that OM has to contact her.
The recidivism rate with these things is VERY high, and you're playing with fire if you don't enter into as bullet-proof as possible a transparency plan.
