Board Thread:WARNING ALL USERS False Info\Spoilers/@comment-95.149.92.195-20140312105606/@comment-6383956-20140317002404

Honestly, I talked about this a bit on Tumblr, but I wonder if Mama McCall walked in on Agent McCall with another man -- because we've seen in S1 how any even slightly perceived homophobia is treated (the Coach being afraid to enforce school rules because Scott was dancing with Danny) -- and I imagine her kneejerk reaction might have been to throw Agent McCall out. Scott would probably be pretty upset with her about that -- but I bet he'd still be angry with his father for never telling him (or for never telling his mom and just cheating on her) even when they were living together (if the writers remember that that's canon even though they haven't mentioned it since 1.03).

See, aside from a couple of weird little facial expressions I've seen, I'm mainly thinking... this is a secret that comes with a reason to want to tell Scott now: if he's fallen in love with a guy, maybe wants to start a family, he's going to want his son to know.

The only other theory I've seen that explains the "why now" thing is the alcoholism theory -- but that falls apart when you look at how much a jerk Agent McCall was to the Sheriff about his drinking.