QQ value bet on K high board

UTG is a 40/13 with fairly moderate aggression. With his turn and river checks it doesn't look like he can beat a pair of kings, but with my own turn check he might call with a lower pair? I think my line looks like a steal and he's possibly smart enough to recognise that. If he raises I fold, but I don't think he's capable of bluffing me here.

Full Tilt Poker
No Limit Holdem Ring game
Blinds: $0.10/$0.25
7 players
Converter

Stack sizes:
UTG: $61.15
UTG+1: $18.90
Hero: $36.20
CO: $45.70
Button: $25.40
SB: $21.10
BB: $29.95

Pre-flop: (7 players) Hero is MP1 with Q:spade: Q:diamond:
UTG calls, UTG+1 folds, Hero raises to $1.25, 4 folds, UTG calls.

Flop: 2:heart: 5:club: 9:diamond: ($2.85, 2 players)
UTG checks, Hero bets $2, UTG calls.

Turn: K:club: ($6.85, 2 players)
UTG checks, Hero checks.

River: T:spade: ($6.85, 2 players)
UTG checks, Hero bets $4

Looks good.