Middle overpair to a huge bet on the turn

I was playing the full table $50NL cash game when the following hand occured. The villain is a solid player who shows a constant profit on these stakes and I'd say he plays tight agressive.


DEMIRCANN is at seat 1 with 11.50
Rickman is at seat 2 with 35.00
dodgydudge is at seat 3 with 67.12
Laidback3 is at seat 4 with 51.82
balonik is at seat 5 with 48.60
RACZEJ_MAM is at seat 6 with 56.40
citron30 is at seat 7 with 40.00
LaCoste* is at seat 8 with 58.65
trebor1 is at seat 9 with 56.95
Holberg is at seat 10 with 33.15

Holberg posts the large blind 0.50
trebor1 posts the small blind 0.25

trebor1: --, --
Holberg: --, --
DEMIRCANN: --, --
dodgydudge: --, --
Laidback3: --, --
balonik: --, --
RACZEJ_MAM: --, --
LaCoste*: 9 [img]/images/graemlins/diamond.gif[/img], 9 [img]/images/graemlins/heart.gif[/img]

Pre-flop:

DEMIRCANN: Call 0.50
dodgydudge: Fold
Laidback3: Fold
balonik: Raise 1.50
RACZEJ_MAM: Call 1.50
LaCoste*: Call 1.50
trebor1: Fold
Holberg: Fold
DEMIRCANN: Call 1.50


Flop (Board: 7 [img]/images/graemlins/diamond.gif[/img], 8 [img]/images/graemlins/diamond.gif[/img], 4 [img]/images/graemlins/spade.gif[/img]):

DEMIRCANN: Check
balonik: Check
RACZEJ_MAM: Bet 4.00
LaCoste*: Call 4.00
DEMIRCANN: Fold
balonik: Fold

Turn (Board: 7 [img]/images/graemlins/diamond.gif[/img], 8 [img]/images/graemlins/diamond.gif[/img], 4 [img]/images/graemlins/spade.gif[/img], 2 [img]/images/graemlins/club.gif[/img]):

RACZEJ_MAM: Bet 12.00
LaCoste*: ?

What is my line here? What do you think about my play on all streets?