I like JJ, so I'd be so sad if they used an affair plot.

I thought JJ and the new section chief might be family, too. I was thinking father/daughter because the unsub asked him if he had kids and he said yes (probably means nothing, but I thought it might be a writer's hint). At the end, when JJ mentioned she was going to go make supper for her boys, neither of them acted awkward enough for it to feel like an affair to me. And we know from her relationship with Will that JJ's first instinct when she's conflicted is to keep her personal life separated from her team, so if she's trying to reconnect with a family member or something, I could see her keeping it a secret. Granted, if it's a family connection, if it were obvious Garcia or one of the team member would have put it together quickly, so they'd have to have been estranged for some reason. (Separation after her sister's suicide? Or maybe JJ's mom had an affair with him or something along those lines?)

And I just need to shut up now before my bunnies force me to write a one-shot...

Loved the mention of Emily in this epi! :)