Value river raise on dangerous board.

Opp is a 40/20 miniraisor, well known to me as a fish.
Other player in pot is unknown.
I called on the turn becasue i had 6-8 outs to stack this guy, i knew exactly what he had and that he would felt a non-flush river if i hit for sure.
1. Put opp on hand
2. Do you call here and hope for an overcall from sb. My problem with a call is that if sb raises then i probably have to call the bet knowing im beat. If i raise for value on fishy's hand then i know ill get the value call from him and that hes unlikely to put me on the flush as he 'thinks' im a nit (in truth id been card dead after he cold called my raise with AA on the short stack earlier and got a double up) Add to that, i hope the flush wont 3 bet here but call becasue ive shown strength. I simply put sb on a call down donkish play, he'd looked idiot-like while id been watching him.
Likey? yes/no?

Party Poker No-Limit Hold'em, $ BB (5 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

Hero ($130.65)
SB ($130.92)
BB ($135.60)
UTG ($130.27)
MP ($16.86)

Preflop: Hero is Button with 8http://www.flopturnriver.com/phpBB2/...iles/heart.gif, 7http://www.flopturnriver.com/phpBB2/...iles/heart.gif. SB posts a blind of $0.50.
1 fold, MP calls $1, Hero calls $1, SB completes, BB raises to $3, MP folds, Hero calls $2, SB calls $2.

Flop: ($6) 6http://www.flopturnriver.com/phpBB2/...iles/heart.gif, Thttp://www.flopturnriver.com/phpBB2/...miles/club.gif, Khttp://www.flopturnriver.com/phpBB2/...miles/club.gif (3 players)
SB checks, BB checks, Hero checks.

Turn: ($6) 4http://www.flopturnriver.com/phpBB2/...iles/spade.gif (3 players)
SB checks, BB bets $3, Hero calls $3, SB calls $3.

River: ($15) 5http://www.flopturnriver.com/phpBB2/...miles/club.gif (3 players)
SB checks, BB bets $8, Hero raises to $20, SB calls $20, BB calls $12.

Final Pot: $75

Edit: I had to fix the HH from the convertor so i hope the numbers add up (its 5am lolol)