Bullys keep pushing me around

[Enon]

SB: Tough multitabling regular (16/10/2.5)
BB: Have only a few hands on him but seems pretty tag (20/14/2.x)

Figured I was up against at least one other ace, possibly a very fastly played set from the BB or another ace.

My effective odds cold calling another 2 would be 9.5-1 assuming SB just called the additional bet and they would be 7-1 if betting gets capped.

Prudent fold or am I just hopelessly weak tight?

Party Poker 30/60 Hold'em (10 handed) converter

Preflop: Enon is CO with 8[img]/images/graemlins/diamond.gif[/img], A[img]/images/graemlins/diamond.gif[/img].
<font color="#666666">1 fold</font>, <font color="#CC3333">UTG+1 raises</font>, <font color="#666666">1 fold</font>, MP1 calls, <font color="#666666">1 fold</font>, MP3 calls, Enon calls, <font color="#666666">1 fold</font>, SB calls, BB calls.

Flop: (12 SB) 4[img]/images/graemlins/diamond.gif[/img], 9[img]/images/graemlins/club.gif[/img], A[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(6 players)</font>
SB checks, BB checks, UTG+1 checks, MP1 checks, MP3 checks, <font color="#CC3333">Enon bets</font>, <font color="#CC3333">SB raises</font>, <font color="#CC3333">BB 3-bets</font>, UTG+1 folds, MP1 folds, MP3 folds, Enon folds