Set on 3 flush flop

[C M Burns]

Party Poker No-Limit Hold'em, $2 BB (8 handed)

saw flop|<font color="C00000">saw showdown</font>

BB ($138.75)
<font color="C00000">UTG ($162.45)</font>
UTG+1 ($98)
MP1 ($90)
MP2 ($204)
CO ($206.65)
<font color="C00000">Hero ($87)</font>
SB ($539.50)

Preflop: Hero is Button with 5[img]/images/graemlins/club.gif[/img], 5[img]/images/graemlins/diamond.gif[/img].
UTG calls $2, UTG+1 folds, MP1 calls $2, MP2 folds, CO calls $2, Hero calls $2, SB completes, BB checks.

Flop: ($12) 9[img]/images/graemlins/heart.gif[/img], 5[img]/images/graemlins/heart.gif[/img], 8[img]/images/graemlins/heart.gif[/img] <font color="blue">(6 players)</font>
SB checks, <font color="CC3333">BB bets $4</font>, <font color="CC3333">UTG raises to $20</font>, MP1 folds, CO folds, <font color="CC3333">

Now what? no real read on the player. Do you think your hand is good here? Calling seems like it will just put me in the same spot on the turn, unless maybe another heart comes i could fold. and any raise more or less pot comits me so it seems like an allin or fold situation. Does anyone fold here?