4flush, villian shoves river.. where am i? emo tear, 50nl stars

[freshbeats]

no history... just sat down. hate that.

PokerStars No-Limit Hold'em, $0.50 BB (8 handed) Poker Stars Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

Button ($50)
SB ($25.30)
BB ($16.90)
UTG ($68.60)
UTG+1 ($66.80)
MP1 ($76.05)
MP2 ($45.75)
Hero ($53.25)

Preflop: Hero is CO with 8, 9.
1 fold</font>, UTG+1 calls $0.50, 1 fold</font>, MP2 raises to $1.5</font>, Hero calls $1.50, 3 folds, UTG+1 calls $1.

Flop: ($5.25) 4, Q, A (3 players)</font>
UTG+1 checks, MP2 bets $2</font>, Hero raises to $6</font>, UTG+1 folds, MP2 calls $4.

Turn: ($17.25) 2 (2 players)</font>
MP2 checks, Hero bets $12</font>, MP2 calls $12.

River: ($41.25) 3 (2 players)</font>
MP2 bets $26.25 (All-In)</font>, Hero ?

my gut instinct is to call, since i don't think he takes this flop/turn line with any hand that includes a shove-worthy diamond... really i want to know if i'm out of line in calling.