I don’t think making your situation harder than it already is would help you. However I think you need to really understand how hard it really is...
Regarding her job and her ongoing work there. Here are some issues and questions:
What is their work-relationship? Is he in any way her superior?
Somehow they met and managed to find a connection at work.
My experience – both in real-life and on this site – is that people hooking up at work think nobody knows. They think nobody notices the glances, the touches, the how they always seem to be coming from the same break-room, how they are always absent from the cafeteria at the same days at lunch, how they always let their separate coworkers know that they need to see a dentist during the break (or whatever excuse they give to go off-site), how neither of them is present, but her car is still in the parking lot...
Her coworkers KNOW.
Chances are her best friend (both BFF at work and at home) knew. Chances are his friends knew. Chances are that Becky in Accounting and Joe the sales-rep know, or have heard the office gossip.
Don’t be under any illusion that this was so secret that only he and she were in the know.
Did she share photos with sexual content? If so, is she recognizable on any of them?
Do a search on revenge-porn laws in your state. Be aware that once leaked online it’s near-impossible to stop. You don’t want your kid to come home crying one day because Biff the bully found his mom on sexymillfsdotcom. She might want to send him a formal letter through an attorney reminding him that any shared photos were for personal use, and that any distribution – intended or accidental – will lead to legal action and possible felony charges. That his best option would be to delete this content.
"If, therefore, any be unhappy, let him remember that he is unhappy by reason of himself alone." Epictetus