1400BB deep riverdecision with a set (live)

[Arito]

(1 euro = 1,3 dollar)

It's a live €0.50/€0.50 homegame. We are 6-handed in a game that has run continuously from fridayafternoon untill mondaymorning. The game plays a bit like a 100NL game with a standard raise to €3.50. The game is loose-passive pre-flop and pretty aggressive post-flop.

Villain is a decent TAG, who always c-bets the flop and fires the turn against me. He has a little over €700 in his stack and I cover. He has been playing 20 hours straight at this point.

I am (to him) a decent TAG, that doesn't get out of line too much. I bet my draws, made hands and whenever there is weakness and I am inclined to fold to overbets when there is a reasonable chance he has what he is representing.

The hand:

It folds to villain who raises to €3.50 in the cut-off. The button folds, I call in the big blind with 8 [img]/images/graemlins/diamond.gif[/img]8 [img]/images/graemlins/heart.gif[/img] and the 'fish' of the table calls in the big blind.

The flop is K [img]/images/graemlins/spade.gif[/img]A [img]/images/graemlins/heart.gif[/img]8 [img]/images/graemlins/spade.gif[/img]. Checked to villain who c-bets €9. I call, fearing I might scare the fish if I raise and perhaps he improves his hand on the turn. Also, I am sure villain fires on any non-spade turn. The fish folds.

The turn is the 2 [img]/images/graemlins/club.gif[/img]. I checkraise villain's €25 bet to €100. He calls.

The river is the 2 [img]/images/graemlins/spade.gif[/img]

I...?

Question 1: What do you do?
Question 2: What do you do if you bet €150 and he pushes?
Question 3: What do you do if you check and he overbets the pot (say €400) or pushes?
Question 4: How do your answers change if the river was the A [img]/images/graemlins/diamond.gif[/img]?