Playing QQ on the turn with an overcard on the board

[CesareBorgia]

Party Poker No-Limit Hold'em, $0.25 BB (6 handed) Hand History converter Courtesy of PokerZion.com

Hardly any reads or other data available on UTG and MP. I did notice, however that UTG made one or two questionable calls on the flop so far, which, in my opinion indicates that he's either a very good player or a very bad one. At NL25 with blinds of 10cts and 25cts, I always assume it's the latter.

Button ($15.95)
SB ($25.21)
BB ($10.29)
UTG ($32.54)
MP ($13.19)
Hero ($40.63)

Preflop: Hero is CO with Q[img]/images/graemlins/heart.gif[/img], Q[img]/images/graemlins/spade.gif[/img].
UTG calls $0.25, <font color="#CC3333">MP raises to $0.5</font>, <font color="#CC3333">Hero raises to $2.2</font>, <font color="#666666">3 folds</font>, UTG calls $1.95, MP calls $1.70.

Flop: ($6.95) 9[img]/images/graemlins/spade.gif[/img], 8[img]/images/graemlins/diamond.gif[/img], K[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(3 players)</font>
UTG checks, MP checks, <font color="#CC3333">Hero bets $4.5</font>.

I consider myself to be on thin ice here. There is a K on the board. However, the field has been narrowed down to three players here. If neither one of them has a K, my QQ is probably good.

The betting proceeds and UTG and MP each call $4.50.

Turn: ($20.45) 6[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
UTG checks, MP checks.

Hero checks, right? Maybe one of the players is a complete donk and calls my bet with a pair of eights or nines or some other hand that is only barely better than an ace high, but not both of them. Only rarely would I have the best hand at this point. Am I correct in this assessment?