Can I fold this river? (Underfull) $50PLO8

Well, first, should I even be playing this hand?
$50 PL O8
I've got a $94 stack.
Hero SB $.25 with Q [img]/images/graemlins/heart.gif[/img]Q [img]/images/graemlins/club.gif[/img]5 [img]/images/graemlins/club.gif[/img]2 [img]/images/graemlins/spade.gif[/img]
4 limpers, I limp, BB checks. - Stacks range from $35-$45.
Flop K [img]/images/graemlins/heart.gif[/img]T [img]/images/graemlins/diamond.gif[/img]2 [img]/images/graemlins/diamond.gif[/img]K
Checks around.
Turn Q [img]/images/graemlins/diamond.gif[/img]
Checks around.
River K [img]/images/graemlins/club.gif[/img]
Me and BB check, UTG limper folds, UTG+1 limper bets $1 into the $2.75 pot. 2 folds, I call, BB folds. Limper shows A [img]/images/graemlins/diamond.gif[/img]7 [img]/images/graemlins/diamond.gif[/img]K [img]/images/graemlins/spade.gif[/img]T [img]/images/graemlins/club.gif[/img] for the 2nd nuts. Was it a bad call on the river? Should I have bet out on the turn or river? No real reads on this player...I figured with the checks around, could have been betting a flush or just trips. What's your play?