Can this be Aces?

[Stealthy]

MP3 here is 91/30/1.4. His limp re-raise pre-flop makes Aces a consideration, especially when he keeps 3 betting me.

Party Poker 1/2 Hold'em (6 max, 6 handed) FTR converter on zerodivide.cx

Preflop: Hero is Button with 8[img]/images/graemlins/diamond.gif[/img], 8[img]/images/graemlins/club.gif[/img].
<font color="#666666">1 fold</font>, MP calls, <font color="#CC3333">CO raises</font>, Hero calls, SB calls, BB calls, <font color="#CC3333">MP 3-bets</font>, CO calls, Hero calls, SB calls, BB calls.

Flop: (15 SB) 8[img]/images/graemlins/spade.gif[/img], A[img]/images/graemlins/club.gif[/img], 5[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(5 players)</font>
SB checks, BB checks, <font color="#CC3333">MP bets</font>, CO calls, <font color="#CC3333">Hero raises</font>, SB calls, BB folds, <font color="#CC3333">MP 3-bets</font>, CO calls, Hero calls, SB calls.

Turn: (13.50 BB) K[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(4 players)</font>
SB checks, <font color="#CC3333">MP bets</font>, CO folds, <font color="#CC3333">Hero raises</font>, SB calls, <font color="#CC3333">MP 3-bets</font>, Hero calls, SB calls.

River: (22.50 BB) 4[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(3 players)</font>
SB checks, <font color="#CC3333">MP bets</font>, Hero?

I call the 3 bet flop so that I don't shut him down giving me a chance to raise again on the turn. I don't cap the turn as I am seriously considering that he has Aces. Was I too passive here given that his stats mark him as a LAG player, and should I ALWAYS cap this regardless of the outcome?

Monsters under the bed anyone?