NL50 - Set getting donked twice

[ChulioBarth]

BB is a huge fish. I really couldn't put him on hand.
Some fish will donk as he weakish as he did with a monster, others would overbet the pot.
What does Hero do (obviously not folding)?

Titan Poker 0.25/0.50, hand converted by the iPoker Converter at Talking-Poker

Button Hero ($47.00)
SB ($37.85)
BB ($59.10)
UTG ($24.35)
UTG+1 ($31.53)

Preflop: Hero is on the Button with 8 [img]/images/graemlins/club.gif[/img] 8 [img]/images/graemlins/diamond.gif[/img]
2 folds, Hero raises to 2.00, 1 fold, BB calls 1.50.

Flop (4.25) 8 [img]/images/graemlins/heart.gif[/img] 6 [img]/images/graemlins/heart.gif[/img] 2 [img]/images/graemlins/diamond.gif[/img]
BB checks, Hero bets 3.00, BB calls 3.00.

Turn (10.25) 4 [img]/images/graemlins/club.gif[/img]
BB bets 3.00, Hero raises to 9.00, BB calls 6.00.

River (28.25) Q [img]/images/graemlins/heart.gif[/img]
BB bets 10.50, Hero ?