Defend blind with A2 off?

[bds]

<font color="blue">Cutoff is 56/9/1.5 and open raises. I’m in BB with A2. All fold to me. I’d specifically like feedback on whether you call this preflop raise, fold or reraise. Comments on all streets welcome.
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Party Poker 10/20 Hold'em (6 max, 5 handed) converter

Preflop: Hero is BB with 2[img]/images/graemlins/diamond.gif[/img], A[img]/images/graemlins/spade.gif[/img].
<font color="#666666">1 fold</font>, <font color="#CC3333">MP raises</font>, <font color="#666666">2 folds</font>, Hero calls.

Flop: (4.50 SB) A[img]/images/graemlins/diamond.gif[/img], 2[img]/images/graemlins/spade.gif[/img], J[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, MP checks.

Turn: (2.25 BB) T[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets</font>, <font color="#CC3333">MP raises</font>, <font color="#CC3333">Hero 3-bets</font>, MP calls.

River: (8.25 BB) A[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets</font>, <font color="#CC3333">MP raises</font>, <font color="#CC3333">Hero 3-bets</font>, <font color="#CC3333">MP caps</font>, Hero calls.

Final Pot: 16.25 BB