$5.50 Bodog KK Hand - Donktastic?

Read is that villain is a donk (like me). Anyone paying attention would have noticed that this is the first pot I've raised PF.

My question is whether the turn bet was too meek. The only hand I could imagine him calling the PF bet and then the flop bet with was 99+ and in retrospect I suppose A8 at this level. The board being paired concerned me, but I was less worried about the possible straight draw. Comments on all streets appreciated.

UTG t487.50
Hero t1095.00
MP t4342.50
CO t1165.00
Button t365.00
SB t880.00
BB t1665.00

Hero has KsKd
Blinds are 15/30
1 fold, Hero raises to t90, 4 folds, BB calls

Flop: 7d 8c 8h (Pot: t195)

BB checks, Hero bets t140, BB calls

Turn: Jh (Pot: t475)

BB checks, Hero bets t200, BB calls

River: 9d (Pot: t875)

BB checks, Hero checks