Shoud I fold the turn here

Should I just give him credit for a nine and fold. Or should I consider that he night have another pocket pair here and check call. I find it strange that he would cap the betting having flopped trips like this most players tend to slowplay until the turn. Any thoughts

pinjata: posts small blind $1
çNosferatuç: posts big blind $2
*** HOLE CARDS ***
Dealt to <font color="red"> ero </font> [Q [img]/images/graemlins/heart.gif[/img] Q [img]/images/graemlins/spade.gif[/img]]
<font color="red"> Hero </font> : raises $2 to $4
DMB2309: calls $4
Absico: calls $4
pinjata: folds
çNosferatuç: calls $2
*** FLOP *** [9 [img]/images/graemlins/club.gif[/img] 9 [img]/images/graemlins/diamond.gif[/img] 2 [img]/images/graemlins/heart.gif[/img]]
çNosferatuç: checks
<font color="red"> Hero </font> : bets $2
DMB2309: calls $2
Absico: raises $2 to $4
çNosferatuç: folds
<font color="red"> Hero </font> : raises $2 to $6
DMB2309: folds
Absico: raises $2 to $8
Betting is capped
<font color="red"> Hero </font> : calls $2
*** TURN *** [9 [img]/images/graemlins/club.gif[/img] 9 [img]/images/graemlins/diamond.gif[/img] 2 [img]/images/graemlins/heart.gif[/img]] [2 [img]/images/graemlins/spade.gif[/img]]
<font color="red"> Hero </font> : checks