<human>: Basic Info: I am located in Georgia. I am in a custody case with my ex for our 1 child, and we each want primary custody. We currently have a 50/50 temporary order, and a GAL is assigned to our case. I am Pro Se; he has 2 expensive lawyers.

I will be as vague as I can be for fear of my ex finding me out.

When he and I were together, we shared each other's camera rolls. When we broke up, he forgot to revoke my permission. Here I am, almost a year later, and I have uncovered a lot of dirt on him through screenshots and photos. I am filling out the Domestic Relations Financial Affidavit (DRFA) and am wanting to fill in some of the knowledge I know to be true. Only, I will surely be found out that I've been viewing his photos (but with his permission, mind you!). I don't really want to risk him ever finding out that I know about it unless there comes something *really* incriminating, so that is not an option for me right now. 

Should I be questioned (and I definitely will be), what should I say? Is there some legal jargon loophole I could use? Could I plead the 5th? What are my options?

Provide a brief overview of the text.
<bot>: I spy on my ex, have good evidence, how do I work it into my report and have a good cover story?