5NL FR - JTo OTB 3-way, turned nut straight on 3-flush board

[daviddem]

CO has just sat (posted)
BB is 19 / 12.5 / 1.2AF / 10%3b over 50

BB betting range on the turn is below (basically sets, two pairs, top pair + gutshot, and a bunch of flushes). I included slowplayed big hands that he would normally have 3b pre and may have intended to c/r on the flop, so this range may be somewhat optimistic.
QQ+,66,AcKc,AcQc,AcJc,AcTc,Ac9c,Ac8c,Ac7c,Ac6c,Ac5 c,Ac4c,Ac3c,Ac2c,KcQc,KcJc,KcTc,Kc9c,Kc8c,QcJc,QcT c,Qc9c,JTs,Jc9c,Tc9c,Tc8c,9c8c,9c7c,8c7c,8c6c,ATo+ ,KQo,JTo
CO calling range would be the weaker part of the above range (he would probably raise the stronger part)

My equity heads up against one of these ranges is 75% and still 57% vs both.

OK to raise this turn? Sizing is a PSR and leaves only a 40% PSB for the river. I'd think 2/3 PSR ($2) would have been better here? Maybe even less?

River standard check behind after he calls the turn raise and the board pairs? Can't think of anything he calls that turn raise with, that doesn't crush me now.

$0.02/$0.05 No Limit Holdem
FullTiltPoker
8 Players
Hand Conversion Powered by weaktight.com

Stacks:
UTG ($5)
UTG+1 ($5.97)
MP1 ($3.55)
MP2 ($12.71)
CO ($3.50)
Hero ($5.61)
SB ($4.53)
BB ($5.17)

Pre-Flop: ($0.12, 8 players) Hero is BTN
[CO posts $0.05]
4 folds, CO checks, Hero raises to $0.25, 1 fold, BB calls $0.20, CO calls $0.20

Flop: ($0.77, 3 players)
BB checks, CO checks, Hero checks

Turn: ($0.77, 3 players)
BB bets $0.50, CO calls $0.50, Hero raises to $2.70, BB calls $2.20, CO folds

River: ($6.67, 2 players)
BB checks, Hero checks