My prediction is he is going to send Nea a dozen roses to the office (anonymously so she doesn't get in trouble at work but still rubbing McD's nose in it) in gratitude for her help in uncovering their shennanigans. The other office girls will be ribbing her about who this Mystery Man is. Nea, having a good idea who sent the flowers will contact him privately to confirm it was him and they will begin to talk more.
He will invite her out for dinner to thank her personally. They will take a moonlight stroll around the pond outside the restaurant after dinner and drinks. The conversations will turn away from the office politics and the events of the affair and will turn more "personal".
The wine, the human contact, the shared experience, the moonlight bouncing off her shiny hair, the subtle rippling reflections of them together on the water's edge... He turns to her to give her a brotherly hug for her help and support but when she opens her arms to accept his embrace and their eyes meet and their bodies melt into each other..........
......Well, we all know where that will go

💓