Whiffed AK on a paired flop: Fight or run away?

[chesspain]

Party Poker 3/6 Hold'em (9 handed) converter

UTG is a borderline TAG who plays somewhat LAGishly preflop and a bit too passively postflop (approx. 20/15/1.5), and who before this hand was up nearly 50BB in the 120 hands I had on him. Both UTG+1 and Button are loose-passive and prone to calling down with any pair. In addition, for what it's worth, I was card-dead in the fifty hands at this table before this hand, as I had seen maybe 10% of the flops and hadn't won a single hand.

Preflop: chesspain is MP1 with K[img]/images/graemlins/spade.gif[/img], A[img]/images/graemlins/diamond.gif[/img].
<font color="#CC3333">UTG raises</font>, UTG+1 calls, <font color="#CC3333">chesspain 3-bets</font>, <font color="#666666">3 folds</font>, Button calls, <font color="#666666">2 folds</font>, UTG calls, UTG+1 calls.

Flop: (13.33 SB) Q[img]/images/graemlins/spade.gif[/img], 8[img]/images/graemlins/diamond.gif[/img], 8[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(4 players)</font>
<font color="#CC3333">UTG bets</font>, UTG+1 calls, chesspain folds...(???)</font>

Against this lineup, with this flop, and with the action before me, was this fold too weak? If it was, then what should my plan have been?