Is this always a boat line?

[zaaaaaak]

Villain is tight aggressive and hasn't shown down many hands. Should I have folded on the turn? As played, is this a standard river fold?

***** Hand History for Game 4349780437 *****
$25 NL Texas Hold'em - Wednesday, May 24, 13:04:20 ET 2006
Table Table 107956 (Real Money)
Seat 2 is the button
Total number of players : 6
Seat 1: rolliemassimino ( $24.95 )
Seat 2: lonelobe ( $22.65 )
Seat 3: kocember ( $4.65 )
Seat 6: ctandersen ( $10.05 )
Seat 5: zaaaaaak ( $25.05 )
Seat 4: Jaluvius ( $25 )
kocember posts small blind [$0.10].
Jaluvius posts big blind [$0.25].
** Dealing down cards **
Dealt to zaaaaaak [ Jh Kd ]
zaaaaaak raises [$1].
ctandersen folds.
>You have options at Table 108032 Table!.
rolliemassimino folds.
lonelobe calls [$1].
kocember folds.
>You have options at Table 108032 Table!.
Jaluvius folds.
** Dealing Flop ** [ 5c, 5h, Th ]
zaaaaaak bets [$1.50].
lonelobe calls [$1.50].
>You have options at Table 108032 Table!.
** Dealing Turn ** [ Js ]
zaaaaaak bets [$3].
lonelobe raises [$6].
zaaaaaak calls [$3].
** Dealing River ** [ Kh ]
>You have options at Table 108032 Table!.
zaaaaaak checks.
lonelobe is all-In [$14.15]
>You have options at Table 108032 Table!.
zaaaaaak folds.
lonelobe does not show cards.
lonelobe wins $30.65

[dsaxton]

Fold to his turn minraise. This is a favorite line of poor / mediocre players and almost always indicates a strong hand.

[Silly String]

After river you are behind everything he would push. I'd say it is safe to fold the river. That K is the action card. It puts a flush and your 2pair in play. I can't tell you how much money I make with broadway straights because people can't lay down their top 2 pair that was made by the same card that made my straight.