50NL Top Pair on apired board facing overshove

[mdm13]

Playing without HUD on laptop lol. Villain is fishy, he open limps minraises etc but has never been seen getting out of line like this.

Will say what I did with reasons after a few responses.

Full Tilt No-Limit Hold'em, $0.50 BB (5 handed) Full Tilt Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

SB ($37.05)
BB ($41.75)
Hero ($64.10)
MP ($57.50)
Button ($94.95)

Preflop: Hero is UTG with J[img]/images/graemlins/spade.gif[/img], A[img]/images/graemlins/spade.gif[/img].
<font color="#CC3333">Hero raises to $1.75</font>, MP calls $1.75, <font color="#666666">2 folds</font>, BB calls $1.25.

Flop: ($5.50) 8[img]/images/graemlins/heart.gif[/img], J[img]/images/graemlins/heart.gif[/img], 8[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(3 players)</font>
BB checks, <font color="#CC3333">Hero bets $4.5</font>, MP folds, BB calls $4.50.

Turn: ($14.50) A[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">BB bets $35.5 (All-In)</font>, Hero ?