1/2 Baby flush facing small river bet on paired board after turn c/r

[Grandezza]

BB is running 36/27 over 30 hand or so.

Cryptologic
No Limit Holdem Ring game
Blinds: $1/$2
6 players
Converter

Pre-flop: (6 players) Hero is UTG+1 with :4c :5c
UTG calls, Hero calls, CO folds, Button calls, SB folds, BB checks.

Flop: :9d :ac :jc ($9, 4 players)
BB checks, UTG checks, [color=#cc0000]Hero bets $8</font>, Button folds, BB calls, UTG folds.

Turn: :8c ($25, 2 players)
BB checks, [color=#cc0000]Hero bets $17</font>, [color=#cc0000]BB raises to $34</font>, Hero calls.

River: :jd ($93, 2 players)
[color=#cc0000]BB bets $10</font>.
Hero?


Is this an obvious raise?