AA/CC statute of limitations

If someone had an affair for many years, and then later married the 3rd party after divorcing the spouse, what happens if the former spouse finds out the relationship began during the marriage? What is the start date of the statute of limitations for AA/CC in this situation? I read from house bill 1110 that it begins on the last known incident. What does that mean exactly?

The SOL is three years from the date of the last know incident of alienating behavior.

so that would be the date of separation i assume in this case?

The answer to your question would require an evaluation of all the facts and circumstances of your particular case. Such advice is beyond the scope of this forum and would require a consultation.