Villian is tight/passive. Hardly raises preflop. I have been playing semi-lag and have been caught bluffing a couple times. What do you think of my line?

Party Poker No-Limit Hold'em, $ BB (6 max, 5 handed) FTR converter on zerodivide.cx

Hero ($97.85)
Button ($16.50)
SB ($93.90)
BB ($100)
UTG ($199.76)

Preflop: Hero is MP with A, A. SB posts a blind of $0.50.
UTG raises to $3, Hero raises to $10, 3 folds, UTG calls $7.

Flop: ($21.50) T, 7, 6 (2 players)
UTG checks, Hero bets $12, UTG calls $12.

Turn: ($45.50) 7 (2 players)
UTG checks, Hero checks.

River: ($45.50) 8 (2 players)
UTG bets $10, Hero raises to $35