Board 4 flushes on river

[sparky3474]

WPEX 0.05/0.10 Hold'em (10 handed) just sat down, no reads

Preflop: Hero is in the MP3 with Q [img]/images/graemlins/spade.gif[/img]Q [img]/images/graemlins/diamond.gif[/img].
4 limpers, Hero raises, CO folds, everyone calls

Flop: (14 SB) K [img]/images/graemlins/club.gif[/img], 7 [img]/images/graemlins/heart.gif[/img], 6 [img]/images/graemlins/heart.gif[/img](7 players)
6 checks, Hero raises, everyone calls

Turn: (10.5 BB) K [img]/images/graemlins/heart.gif[/img], (7 players)
5 checks, Hero bets, 2 calls

River: (13.5 BB) 2 [img]/images/graemlins/heart.gif[/img](3 players)
MP1 check, MP2 bets, Hero ……?

Here it is, MP2 wakes up when the 4 flush hits, no body wanted much to do with this hand until now, I must be beat. Fold, you have the top 2 pair, call is weak, raise, I don’t think so. What is the smart move now?