Hand 2: A8s in BB

Same table as hand 1 but UTG is new at the table. Button has turned out to be a LAG. He will almost always raise/CR on the turn when he has a hand, but he has bluff raised a couple of times too. I think he usually calls down if he hits anything or if he has an A overcard.

PokerStars 3/6 Hold'em (5 handed)

Preflop: Hero is BB with A/images/graemlins/club.gif, 8/images/graemlins/club.gif.
UTG calls, 1 fold, Button raises, 1 fold, Hero calls, UTG calls.

Flop: (6.33 SB) 5/images/graemlins/club.gif, 8/images/graemlins/diamond.gif, T/images/graemlins/heart.gif (3 players)
Hero checks, UTG checks, Button bets, Hero raises, UTG calls, Button calls.

Turn: (6.16 BB) 3/images/graemlins/spade.gif (3 players)
Hero bets, UTG calls, Button calls.

River: (9.16 BB) 4/images/graemlins/club.gif (3 players)
Hero ???

I guess my problem here was UTG and while I know what I wanted to do I'm not sure what I should do here.

[wackjob]

I like how you played it. I value bet the river.

[imported_ncray]

Nice play. Bet the river.

[KDawgCometh]

i'm leading the river. I like the flop play a lot