Morgan-- PLEASE listen to Neph on this. Is there a women's center near you? You are in a precarious position, being a SAHM. You know that you have the laws on your side as far as disclosing the 3 years financials. But, you also have to worry about today.
As much as I hated to do it, I filed for legal sep the day after I discovered the A. Knowing that he had an OW talking in his ear, I felt that I had to in order to protect the kids' and myself financially, and keep CW from getting near them. I filed a pendente lite motion at the same time, which covers the waiting period. I didn't file for a D, and I also took a withdrawal form with me--I would take this all away in an instant if he only gave the word. It doesn't look like he will.
He has since tried to reduce the weekly payments, and wanted to eliminate the no-contact order. He took my kids to a fair and "just happened" to meet CW there. I know, looking back, that I did the right thing, as much as I hated doing it. Remember that you are not dealing with the man you once knew...