1/2 - river spot against lag

[BigBadBabar]

1/2 6max
game is playing very laggy and we just came off of 3handed
villain is big lagbox, not great but usually has some pair at showdown (and not lagtag but dumb lag like 60/30 or something)
i have been iso3betting him constantly

thoughts on river?

Preflop: Hero is SB with A[img]/images/graemlins/diamond.gif[/img], T[img]/images/graemlins/spade.gif[/img].
<font color="#666666">1 fold</font>, <font color="#CC3333">MP raises</font>, <font color="#666666">1 fold</font>, <font color="#CC3333">Hero 3-bets</font>, <font color="#666666">1 fold</font>, <font color="#CC3333">MP caps</font>, Hero calls.

Flop: (9 SB) Q[img]/images/graemlins/heart.gif[/img], 5[img]/images/graemlins/heart.gif[/img], T[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">MP bets</font>, Hero calls.

Turn: (5.50 BB) Q[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">MP bets</font>, Hero calls.

River: (7.50 BB) K[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">MP bets</font>, Hero ?

[NinaWilliams]

I call. I dont think we're in great shape or anything, but I think he shows up with 55 or A9 or something stupid enough times for a call to show a profit.

[Leader]

I would have raised at some point before this as he'll calldown/bluff 3-bet A-high and lower pairs. I'm calling the river now.

[bboy_]

definately call here and this hand is well played

[Gurravasa]

I'd raise flop and call down if 3-bet. If called on flop I valuecheck turn.

THinking again I may fold turn if 3-bet flop...