TP2K Vs. Half Stack River Play

[btimm]

Villain is 45/10/0.4 over 31 hands. Is this river shove too thin, since the flush hit, or is this standard?

$0.5/$1 No Limit Holdem
6 players
Converted at weaktight.com

Stacks:
UTG ($168.90)
Hero ($101.50)
CO ($96.40)
BTN ($42.85)
SB ($101.50)
BB ($100.00)

Pre-flop: ($1.50, 6 players) Hero is UTG+1 K Q
1 fold, Hero raises to $3.50, 1 fold, BTN calls $3.50, 2 folds

Flop: 2 5 Q ($8.50, 2 players)
Hero bets $6, BTN calls $6

Turn: 8 ($20.50, 2 players)
Hero bets $14, BTN calls $14

River: 4 ($48.50, 2 players)
Hero bets $26

[Fuzzy Logic]

Its fine, I would only check if I knew that he either
a: never bet a worse hand or
b: is likely to bluff if we show weakness.