Bottom Flush Gets Three Bet on the Turn

[imported_leader]

CO is 40/4/1/ 80 hands

Party Poker 2/4 Hold'em (9 handed) converter

Preflop: Hero is BB with 2[img]/images/graemlins/club.gif[/img], 3[img]/images/graemlins/club.gif[/img].
<font color="#666666">5 folds</font>, CO calls, Button calls $2 (All-In), SB completes, Hero checks.

Flop: (4 SB) Q[img]/images/graemlins/diamond.gif[/img], 8[img]/images/graemlins/club.gif[/img], 4[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(4 players, 1 all-in)</font>
SB checks, Hero checks, <font color="#CC3333">CO bets</font>, SB calls, Hero calls.

Turn: (3.50 BB) 7[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(4 players, 1 all-in)</font>
SB checks, Hero checks, <font color="#CC3333">CO bets</font>, SB folds, <font color="#CC3333">Hero raises</font>, <font color="#CC3333">CO 3-bets</font>, Hero...

This is pretty simple. Call this or cap it? If you think I should call, should I bet/call the river or check call? If the board paired on the end, would that change your answer?

Anyone think I should bet out the flop, BTW?