Should I Have Let The Ace Scare Me?

[banditdad]

The Q made me think but the Ace made me check. Should I have bet out on the river with the Ace on the board?

Party Poker 0.50/1 Hold'em (10 handed) converter

Preflop: Hero is UTG+1 with K[img]/images/graemlins/spade.gif[/img], K[img]/images/graemlins/heart.gif[/img].
UTG folds, <font color="CC3333">Hero raises</font>, UTG+2 folds, <font color="CC3333">MP1 3-bets</font>, MP2 folds, MP3 calls, CO folds, Button folds, SB folds, BB calls, <font color="CC3333">Hero caps</font>, MP1 calls, MP3 folds, BB calls.

Flop: (15.50 SB) 9[img]/images/graemlins/spade.gif[/img], 8[img]/images/graemlins/heart.gif[/img], 6[img]/images/graemlins/diamond.gif[/img] <font color="blue">(3 players)</font>
BB checks, <font color="CC3333">Hero bets</font>, <font color="CC3333">MP1 raises</font>, BB calls, <font color="CC3333">Hero 3-bets</font>, <font color="CC3333">MP1 caps</font>, BB calls, Hero calls.

Turn: (13.75 BB) Q[img]/images/graemlins/spade.gif[/img] <font color="blue">(3 players)</font>
BB checks, <font color="CC3333">Hero bets</font>, MP1 calls, BB calls.

River: (16.75 BB) A[img]/images/graemlins/club.gif[/img] <font color="blue">(3 players)</font>
BB checks, Hero checks, MP1 checks.

Final Pot: 16.75 BB