My two pair vs. a TAG's turn donk

[NIX]

I've played a bit with the CO for the last week or so. I have him at 22/13/1.7 over 175 hands. He does show down a bit too often though, especially when he has been the aggressor at some point in the hand. Even so, I don't remember him showing down too many weak hands against me. When he's been on my left, I've stolen his blinds quite often and he puts up little resistance. When he's been on my right, I've 3-bet him a lot in position, with his usual response being to check and fold on the flop or turn. When he has check/raised me, I've usually folded on the turn except when his set owned my TPTK.

I haven't seen him donk a turn before, so what is our plan from here?

Also, I think PF is ok with my read(I fold AT though), but if someone wants to tell me it's a poor choice or that I should be doing this without a read, feel free.

PokerStars 0.50/1.00 Hold'em (6 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

Preflop: Hero is Button with J[img]/images/graemlins/heart.gif[/img], A[img]/images/graemlins/spade.gif[/img].
<font color="#666666">2 folds</font>, <font color="#CC3333">CO raises</font>, <font color="#CC3333">Hero 3-bets</font>, SB calls, <font color="#666666">1 fold</font>, CO calls.

Flop: (10 SB) J[img]/images/graemlins/diamond.gif[/img], A[img]/images/graemlins/heart.gif[/img], T[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
SB checks, CO checks, <font color="#CC3333">Hero bets</font>, SB calls, CO calls.

Turn: (6.50 BB) 2[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
SB checks, <font color="#CC3333">CO bets</font>, Hero ???