and if so what size? Flat the flop?

Villain is a decent 24/20/3.8 TAG. He cbet's 77% of the time. I can't remember what my image was like at the time but I was probably applying a fair bit of pressure to him (3betting and shit) because that's what I usually do.

$2/$4 No Limit Holdem
5 players
Converted at weaktight.com

Stacks:
UTG ($400.00)
CO ($110.68)
Hero ($394.00)
SB ($746.30)
BB ($702.80)

Pre-flop: ($6, 5 players) Hero is BTN
UTG raises to $14, 1 fold, Hero calls $14, 2 folds

Flop: ($34, 2 players)
UTG bets $25.50, Hero raises to $68, UTG calls $42.50

Turn: ($170, 2 players)
UTG checks, Hero ($312)?