Overpair facing aggression, Gas, Chk/Call or Drop it?

[Roadstar]

No solid read on villain, PT had 15 hands on him, 21 VPIP 15% PFR, seems a little agro.



Party Poker 1/2 Hold'em (9 max, 9 handed) converter

Preflop: Hero is MP3 with T[img]/images/graemlins/club.gif[/img], T[img]/images/graemlins/heart.gif[/img]. MP2 posts a blind of $1.
<font color="#CC3333">UTG raises</font>, <font color="#666666">3 folds</font>, <font color="#CC3333">Hero 3-bets</font>, <font color="#666666">4 folds</font>, <font color="#CC3333">UTG caps</font>, Hero calls.

Flop: (10.50 SB) 3[img]/images/graemlins/diamond.gif[/img], 5[img]/images/graemlins/diamond.gif[/img], 2[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">UTG bets</font>, <font color="#CC3333">Hero raises</font>, <font color="#CC3333">UTG 3-bets</font>, Hero calls.

Whats the decision here with 3 bet? If facing overpair I'm toast (AA-JJ), unless villain is pumping flush draw/straight draw (especially A [img]/images/graemlins/diamond.gif[/img])

I decided to take the Chk/Call route. Comments please!!!!!!!

Turn: (8.25 BB) J[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">UTG bets</font>, Hero calls.

River: (10.25 BB) A[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">UTG bets</font>, Hero ????

A falls on river, do you fold here since even A [img]/images/graemlins/diamond.gif[/img] beats you now?

Final Pot: 12.25 BB