NL25 SH Weak Twopair against Backdoor Flush an the River

[stever1k]

PokerStars No-Limit Hold'em, $0.25 BB (6 handed) Poker Stars Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

SB ($20.60)
Hero ($30.90)
UTG ($35.65)
MP ($42.20)
CO ($43.25)
Button ($25)

Preflop: Hero is BB with 8[img]/images/graemlins/club.gif[/img], 9[img]/images/graemlins/club.gif[/img].
<font color="#CC3333">UTG raises to $0.5</font>, MP calls $0.50, <font color="#666666">2 folds</font>, SB calls $0.40, Hero calls $0.25.

Flop: ($2) 9[img]/images/graemlins/spade.gif[/img], 6[img]/images/graemlins/heart.gif[/img], A[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(4 players)</font>
SB checks, Hero checks, <font color="#CC3333">UTG bets $1</font>, MP calls $1, SB calls $1, Hero calls $1.

Turn: ($6) 8[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(4 players)</font>
<font color="#CC3333">SB bets $2</font>, <font color="#CC3333">Hero raises to $7</font>, UTG folds, MP calls $7, SB folds.

River: ($22) Q[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">MP bets $11.25</font>, Hero ...

I guess I should have folded on the flop here :-(

MP was running 25/3/1.22 (VPIP/PFR/AF, 40 hands), while I was thinking he typed into the cat
MP said, "sigh"
MP said, "just fold yerr bluff"
MP said, "FOLD"