TPGK in monotone flop

Villain is 28/16/5 over 180 hands. I think he overvalues TP type hands, and he's pretty passive post flop overall. He c/c'ed 3 streets OOP earlier with a set (rivered boat) on a drawy board vs another opponent.

Edit: No specific notes on UTG but he's 26/20 overall, and opening 20% from early position (ie, not really showing positional awareness) over 150 ish hands.

PokerStars No-Limit Hold'em, $0.50 BB (6 handed) - Poker-Stars Converter Tool from FlopTurnRiver.com

Button ($132.30)
SB ($252.85)
BB ($138.90)
UTG ($134.10)
MP ($58.30)
Hero (CO) ($125)

Preflop: Hero is CO with A, J
UTG bets $1.50, 1 fold, Hero calls $1.50, 1 fold, SB calls $1.25, 1 fold

Flop: ($5.60) A, 7, 8 (3 players)
SB checks, UTG checks, Hero bets $4, SB calls $4, 1 fold

Turn: ($13.60) 7 (2 players)
SB checks, Hero bets $8, SB calls $8

River: ($29.60) 5 (2 players)
SB checks...

Comments?