Standard Weak-Tight Top Pair Laydown Post

[That guy]

Villain is basically unknown. 25 hands: 35% VP, 25% PFR

This kind of thing comes up often... What would you do here?

$400 NL Texas Hold'em
(6 max) (No DP) (Real Money)
Seat 5 is the button
Total number of players : 6
Seat 2: GimmeNutz ( $504.60 )
Seat 3: Donkey1 ( $759.50 )
Seat 4: Donkey2 ( $526.20 )
Seat 5: Donkey3 ( $601.40 )
Seat 6: Donkey4 ( $635.50 )
Seat 1: Hero ( $236 )
Hero posts small blind [$2].
GimmeNutz posts big blind [$4].
** Dealing down cards **
Dealt to Hero [ 8s Kc ]
Donkey1 folds.
Donkey2 folds.
Donkey3 folds.
Hero raises [$12].
GimmeNutz calls [$10].
** Dealing Flop ** [ Qs, 9c, Kh ]
Hero bets [$18].
GimmeNutz calls [$18].
** Dealing Turn ** [ 5s ]
Hero checks.
GimmeNutz bets [$50].
Hero folds.
GimmeNutz does not show cards.
GimmeNutz wins $112