NL10 AA flops JJ8 and meets aggression

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CO is a new player to me and i have no good reads on him, since i am 4-tabling. so i didnt notice him until then.
His first raise didnt mean much to me, i thought maybe he's protecting a weak hand or just trying to bluff me, but i got cautious.

so i called and tried something like a blocking-bet, hoping to get him to fold if theres nothing or at least not to get raised again, but he did raise(maybe it seemed like weakness to him ??)...

Whats your line in this situation or would you play a whole other style?

thanks for any explanatory posts...

Poker Stars, $0.05/$0.10 NL Hold'em Cash Game, 9 Players
LeggoPoker.com - Hand History Converter

MP1: $15
MP2: $5.80
CO: $10.50
BTN: $1.40
SB: $5.30
BB: $10.40
UTG: $14.40
UTG+1: $10.10
Hero (UTG+2): $12.70

Pre-Flop: A[img]/images/graemlins/diamond.gif[/img] A[img]/images/graemlins/club.gif[/img] dealt to Hero (UTG+2)
2 folds, <font color="red">Hero raises to $0.40</font>, 2 folds, CO calls $0.40, 3 folds

Flop: ($0.95) J[img]/images/graemlins/club.gif[/img] 8[img]/images/graemlins/heart.gif[/img] J[img]/images/graemlins/heart.gif[/img] (2 Players)
<font color="red">Hero bets $0.50</font>, <font color="red">CO raises to $1</font>, Hero calls $0.50

Turn: ($2.95) Q[img]/images/graemlins/spade.gif[/img] (2 Players)
<font color="red">Hero bets $1</font>, <font color="red">CO raises to $2</font>, Hero ?