2pair facing river shove on 50NL

[mAkCQRE]

CO is a HUGE nit, 12.7 / 0.9 / 1.5, 110 hands
MP is a donator but that shouldnt concern us much.

This river is a fold imho, what do you think about it?
Also what do you think about the turn bet?

PokerStars No-Limit Hold'em, $0.50 BB (6 handed) Poker Stars Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

Hero ($51.40)
UTG ($38.20)
MP ($4.15)
CO ($48.65)
Button ($37.25)
SB ($17.10)

Preflop: Hero is BB with A[img]/images/graemlins/heart.gif[/img], 2[img]/images/graemlins/club.gif[/img].
UTG calls $0.50, MP calls $0.50, CO calls $0.50, <font color="#666666">2 folds</font>, Hero checks.

Flop: ($2.25) 6[img]/images/graemlins/club.gif[/img], A[img]/images/graemlins/diamond.gif[/img], 4[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(4 players)</font>
<font color="#CC3333">Hero bets $1.5</font>, UTG calls $1.50, <font color="#CC3333">MP raises to $3.65</font>, CO calls $3.65, Hero calls $2.15, UTG folds.

Turn: ($14.70) 2[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">Hero bets $10.5</font>, CO calls $10.50.

River: ($35.70) T[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
Hero checks, <font color="#CC3333">CO bets $34 (All-In)</font>, Hero ...