$55: Scare card on river. Call his overbet?

[AA suited]

Party Poker No-Limit Hold'em Tourney, Big Blind is t15 (10 handed) FTR converter on zerodivide.cx

MP3 (t1030)
CO (t975)
Button (t875)
SB (t1195)
BB (t1000)
UTG (t1075)
HERO (t925)
UTG+2 (t1095)
MP1 (t1035)
MP2 (t795)

Preflop: HERO is UTG+1 with J[img]/images/graemlins/club.gif[/img], J[img]/images/graemlins/diamond.gif[/img].
1 fold</font>, HERO calls t15, 5 folds</font>, Button calls t15, SB completes, BB checks.

Flop: (t57.50) T[img]/images/graemlins/club.gif[/img], 2[img]/images/graemlins/diamond.gif[/img], 7[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(4 players)</font>
SB checks, BB checks, HERO bets t50</font>, Button calls t50, SB folds, BB folds.

Turn: (t157.50) 5[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">HERO bets t125</font>, Button calls t125.

River: (t407.50) A[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
HERO checks, <font color="#CC3333">Button bets t410</font>, HERO ??? [img]/images/graemlins/confused.gif[/img]
Final Pot: t1227.50

No reads.

On the river, there's an overcard and a flush possible.

Suggestions on my river play?

Edited by durron597 to fix coloring