[50NL FR] TPTK vs unkown

Villain just sat down a few hands ago. This is one spot where my 6max instincts start to take over I think. I'd really have no problem stacking here in 6max but Im guessing this is a clear fold vs an unknown at FR

pokerstars Game #18672766490: Hold'em No Limit ($0.25/$0.50) - 2008/07/08 - 13:17:51 (ET)
Table 'Scheila' 9-max Seat #5 is the button
Seat 1: ZAGARA66 ($53.80 in chips)
Seat 2: Landersp ($58 in chips)
Seat 3: r090676 ($70.30 in chips)
Seat 4: Ken2it ($20 in chips)
Seat 5: stilgar79 ($28.45 in chips)
Seat 6: shloogy ($7 in chips)
Seat 7: bw07507 ($107.65 in chips)
Seat 8: Nagano6 ($7.10 in chips)
Seat 9: Mateo83 ($21.15 in chips)
shloogy: posts small blind $0.25
bw07507: posts big blind $0.50
Ken2it: posts small blind $0.25
*** HOLE CARDS ***
Dealt to bw07507 [Kh Ac]
Nagano6: folds
Mateo83: calls $0.50
ZAGARA66: calls $0.50
Landersp: folds
r090676: folds
Ken2it: folds
stilgar79: folds
shloogy: folds
bw07507: raises $2.75 to $3.25
Mateo83: calls $2.75
ZAGARA66: calls $2.75
*** FLOP *** [5h 8c Ks]
bw07507: bets $7
Mateo83: folds
ZAGARA66: raises $18 to $25
bw07507 ?

Jesus, that board is super dry. Against a full stacked semi-nitty player, this is a fold for me. This looks like a set or 85, but jesus, its hard to fold TPTK. But the preflop action just reeks of a set.

/me votes for fold, but wonders if he could do the same in the heat of the moment.

WA/WB spot imo.
I probably make fold here since I am a nit and hope villain doesnt turn out to be a fish that plays KQ KJ this way. Doubt he does it with 67

I don't think we can play for stacks here without some kind of read. It's a reluctant fold for me, but i will certainly keep on eye on villain. If he's decent, he probably had you beat. Otherwise you'll get his $$ sooner or later anyway.

Yeah I probably fold this without a read. Most people don't raise a smaller king here, usually just call, so until I have a read that he's bad and will raise, I'm probably folding.

yeah this one reeks of a set.

if he's bad enough to be playing something you beat that aggressively he should be making that fact crystal clear real soon.

Thx for the advice guys, I actually did fold this one and thought it was a good decision. It was right at the end of my session where i was up a good $150 and I kind of think this played into my decision to just fold it. Bad thinking, but good play I think, lol.