Villain is 29/14 over ~100 hands, mostly mined, I have no history or specific reads. What do you think of my turn check? I'm planning on c/c'ing, repping missed overs. What's your river play?

Full Tilt Poker - No Limit Holdem Ring game - Blinds: $1/$2 - 8 players - Converter

Stack sizes:
UTG: $205.55
UTG+1: $216.15
MP1: $194
MP2: $201.30
CO: $153
Button: $168.50
SB: $161.70
Hero: $404.90

Pre-flop: (8 players) Hero is BB with A A
5 folds, Button calls, SB folds, SB folds, Hero raises to $12, Button calls.

Flop: J 5 J ($25, 2 players)
Hero bets $20, Button calls.

Turn: 4 ($65, 2 players)
Hero checks, Button checks.

River: Q ($65, 2 players)
Hero...