7789 on 67T borad w/ FD, turn T

[ZingyDNA]

PokerStars Pot-Limit Omaha High, $0.50 BB (6 handed) internettexasholdem.com

MP ($46.90)
CO ($49.95)
Button ($40.75)
Hero ($61.05)
BB ($159.05)
UTG ($147.10)

Preflop: Hero is SB with 7[img]/images/graemlins/spade.gif[/img], 9[img]/images/graemlins/diamond.gif[/img], 8[img]/images/graemlins/club.gif[/img], 7[img]/images/graemlins/diamond.gif[/img].
UTG calls $0.50, <font color="#666666">2 folds</font>, Button calls $0.50, Hero completes, <font color="#CC3333">BB raises to $2.5</font>, UTG calls $2, Button calls $2, Hero calls $2.

Flop: ($10) 7[img]/images/graemlins/heart.gif[/img], T[img]/images/graemlins/heart.gif[/img], 6[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(4 players)</font>
<font color="#CC3333">Hero bets $7.5</font>, BB calls $7.50, UTG folds, Button calls $7.50.

Turn: ($32.50) T[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(3 players)

No reads other than that table has been passive overall.
Stack sizes seem awkward. What's my action?