Good spot for a bluff? Live Game

[lambdb]

8 handed
Blinds: 2-5 pot limit

MP raises to 15, ( tight straighforward player who will c-bet usually but lay down hands vs pressure)
HJ Calls ( Calling station but will usually raise big with made hands)
I call on the button.

my hand in the highjack: A [img]/images/graemlins/diamond.gif[/img]K [img]/images/graemlins/spade.gif[/img]8 [img]/images/graemlins/club.gif[/img]9 [img]/images/graemlins/club.gif[/img]

Flop: 7 [img]/images/graemlins/spade.gif[/img]5 [img]/images/graemlins/club.gif[/img]J [img]/images/graemlins/heart.gif[/img]

MP makes it 20,
HJ CAll..
I Call

TURN: 3 [img]/images/graemlins/spade.gif[/img]

MP 30..
MP+1 ..call
I call

River:2 [img]/images/graemlins/spade.gif[/img]
MP: 40
MP+1:call
I make it $250 total..

Reasoning for the bluff...My read on MP is he does not have spades and will fold...MP+1 would raise with the A of spades and I hold that magical king of spades.

Standard play? Like/ No Like?