Villain is 30/0 over 25hh

Thoughts on turn and river appreciated. :)

Party, $0.10/$0.25 No Limit Hold'em Cash, 6 Players
Poker Tools Powered By Holdem Manager - The Ultimate Poker Software Suite.

SB: $63.48 (253.9 bb)
BB: $23.43 (93.7 bb)
UTG: $32.70 (130.8 bb)
MP: $25.35 (101.4 bb)
Hero (CO): $25.65 (102.6 bb)
BTN: $20.33 (81.3 bb)

Preflop: Hero is CO with Ad Kc
2 folds, Hero raises to $0.75, BTN calls $0.75, SB calls $0.65, BB calls $0.50

Flop: ($3) 5d Ac Kh (4 players)
SB checks, BB checks, Hero bets $1.50, BTN folds, SB calls $1.50, BB folds

Turn: ($6) 5c (2 players)
SB checks, Hero bets $4, SB raises to $8, Hero calls $4

River: ($22) 7c (2 players)
SB checks, Hero??