rivered small two pair, weak play?

[Spook]

MP1 is winning a lot by calling a lot. 70 percent of the hands he is in - has only shown good things.

Party Poker 3/6 Hold'em (8 handed) converter

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

Flop: (4 SB) 4[img]/images/graemlins/diamond.gif[/img], Q[img]/images/graemlins/heart.gif[/img], A[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(4 players)</font>
<font color="#CC3333">SB bets</font>, Hero calls, MP1 calls, MP2 calls.

Turn: (4 BB) 5[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(4 players)</font>
<font color="#CC3333">SB bets</font>, Hero calls, MP1 calls, MP2 calls.

River: (8 BB) 2[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(4 players)</font>
SB checks, Hero checks, <font color="#CC3333">MP1 bets</font>, MP2 folds, SB calls, Hero calls.

Final Pot: 11 BB

Is the flop call ok? I thought more about folding the turn when I paired. But figured that I might escape the flush. and a three would be an out. (althought maybe a split pot)