NL100 Cash: 3.2:1 to call river 3bet??

[Scuba Chuck]

Villain just sat down about 10 hands ago, and nothing noticeable in first few hands.

Full Tilt Poker No-Limit Hold'em, $1 BB (2 handed) Hand History converter Courtesy of PokerZion.com

Hero ($50.50)
Button ($108.50)

Preflop: Hero is BB with J[img]/images/graemlins/club.gif[/img], 5[img]/images/graemlins/club.gif[/img]. Button posts a blind of $1.
<font color="#CC3333">Hero raises to $2</font> (misclick), Button (poster) calls $1.

Flop: ($4) 5[img]/images/graemlins/diamond.gif[/img], 4[img]/images/graemlins/spade.gif[/img], A[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
Button checks, <font color="#CC3333">Hero bets $3</font>, Button calls $3.

Turn: ($10) K[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
Button checks, Hero checks.

River: ($10) J[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Button bets $6</font>, <font color="#CC3333">Hero raises to $16</font>, <font color="#CC3333">Button raises to $38</font>, Hero...

Without looking at moneys I fold here, but it's my last $22 to win $70...