50nl 6max: TPGK facing river bet, call or fold?

[peyote_sandwich]

Villain is 20/15 after 50 hands.

Effective stacks are 160bb.

Does he open with 66, 77? Since I have Ad busted flush looks unlikely. Does AK call my flop cbet?

Party Poker
No Limit Holdem Ring game
Blinds: $0.25/$0.50
6 players
Converter

Pre-flop: (6 players) Hero is SB with A[img]/images/graemlins/diamond.gif[/img] Q[img]/images/graemlins/spade.gif[/img]
UTG folds, <font color="#cc0000">UTG+1 raises to $2</font>, 2 folds, <font color="#cc0000">Hero raises to $8</font>, BB folds, UTG+1 calls.

Flop: 7[img]/images/graemlins/diamond.gif[/img] 6[img]/images/graemlins/diamond.gif[/img] 3[img]/images/graemlins/spade.gif[/img] ($16.5, 2 players)
<font color="#cc0000">Hero bets $10</font>, UTG+1 calls.

Turn: A[img]/images/graemlins/club.gif[/img] ($36.5, 2 players)
Hero checks, <font color="#cc0000">UTG+1 bets $15</font>, Hero calls.

River: 2[img]/images/graemlins/spade.gif[/img] ($66.5, 2 players)
Hero checks, <font color="#cc0000">UTG+1 bets $40</font>, Hero ?