IS it ok to stack off here with TPTK?

[Tryptamean]

no reads, so I guess these guys have not gotten my attention by playing super loose or super retarded

PokerStars No-Limit Hold'em, $0.50 BB (8 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

Button ($49.85)
Hero ($49.90)
BB ($48.50)
UTG ($33.65)
UTG+1 ($36.35)
MP1 ($28.05)
MP2 ($7.75)
CO ($99.10)

Preflop: Hero is SB with A[img]/images/graemlins/heart.gif[/img], Q[img]/images/graemlins/diamond.gif[/img].
UTG calls $0.50, <font color="#666666">1 fold</font>, <font color="#CC3333">MP1 raises to $1</font>, <font color="#666666">3 folds</font>, Hero calls $0.75, BB calls $0.50, UTG calls $0.50.

Flop: ($4) 9[img]/images/graemlins/spade.gif[/img], 8[img]/images/graemlins/club.gif[/img], Q[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(4 players)</font>
Hero checks, BB checks, UTG checks, <font color="#CC3333">MP1 bets $1.5</font>, <font color="#CC3333">Hero raises to $4.5</font>, BB folds, <font color="#CC3333">UTG raises to $9.5</font>, MP1 folds, Hero?