[mgsimpleton]

i mean there are obviously arguments for folding and calling, it is very possible this is a weak A trying to push you off a chop, but if he's a good player he knows you wouldn't bet the river with a weak A. the things you're beating are any A and a KQ/QJ type hand that's bluffing now... you keep stressing you are seen as weak tight so if this guy is aggro i'm leaning towards a call especially since you bet half pot on the river which screams blocking bet... but to reiterate what coltrane said, if he thinks you are weak-tight enough to only bet the nuts kind of thing, this is an easy just call with a set on the turn and an easier push on the river, so if he has a boat this is exactly how he would play it. but boats aren't very likely. it would have to be TTT, AA222, or 2222 since anything else would reraise preflop (hell i'm surprised if TT doesn't reraise if preflop is as crazy as you say).