100nl - 98s Nit Getting wild

[GSykes]

Poker Stars, $0.50/$1 NL Hold'em Cash Game, 4 Players
LegoPoker Hand History Converter

BB: $109.35
UTG: $84.70
Hero (BTN): $171.85
SB: $55.50

Pre-Flop: 9[img]/images/graemlins/heart.gif[/img] 8[img]/images/graemlins/heart.gif[/img] dealt to Hero (BTN)
UTG calls $1, <font color="red">Hero raises to $5</font>, SB folds, BB calls $4, UTG folds

Flop: ($11.50) A[img]/images/graemlins/heart.gif[/img] K[img]/images/graemlins/heart.gif[/img] A[img]/images/graemlins/diamond.gif[/img] (2 Players)
BB checks, <font color="red">Hero bets $8</font>, BB calls $8

Turn: ($27.50) 2[img]/images/graemlins/heart.gif[/img] (2 Players)
BB checks, <font color="red">Hero bets $14</font>, BB calls $14

River: ($55.50) 9[img]/images/graemlins/club.gif[/img] (2 Players)
BB checks, <font color="red">Hero bets $33.95</font>, BB calls $33.95

Villian is 22/18/3.5
I've been on this table for like 10-15 orbits running at like 17/15ish

I figured he was looking to check raise the turn so I bet weaker to make it look like he had even more fold equity to raise 3x my bet. (is this the wrong kind of thinking)