NL100 JJ on ragged flop faces heat on turn??

[HBomb]

Villian appears to be 4-6 tabling, possibly a regular at $100 NL on stars but I haven't played at these stakes long enough to know the regulars enough... he seems quite taggish.

Poker Stars - No Limit Hold'em Cash Game - $0.50/$1 Blinds - 6 Players - (LegoPoker HH Converter)

SB: $71.40
BB: $41.50
UTG: $26.80
MP: $18.10
CO: $161.65
<font color="black">Hero (BTN): $101.00</font>

<font color="black">Preflop:</font> Hero is dealt J[img]/images/graemlins/club.gif[/img] J[img]/images/graemlins/diamond.gif[/img] (6 Players)
2 folds, <font color="red">CO raises to $4.00</font>, <font color="red">Hero raises to $12.00</font>, 2 folds, CO calls $8.00

<font color="black">Flop:</font> ($25.50) 6[img]/images/graemlins/club.gif[/img] 5[img]/images/graemlins/diamond.gif[/img] 8[img]/images/graemlins/club.gif[/img] (2 Players)
<font color="red">CO bets $15.00</font>, Hero calls $15.00

<font color="black">Turn:</font> ($55.50) Q[img]/images/graemlins/club.gif[/img] (2 Players)
<font color="red">CO bets $25.00</font>

Hero:?????
Pot Size: $80.50

[Elandriel]

Why do you call the flop? I would raise there, especially bc he bets a small amount. i fold on the turn as played.

[HBomb]

Why then is he leading the flop if he knows I could potentially have a monster? Is this an insta-fold if I get reraised after raising flop?

If he smooth calls the reraise on turn and he leads turn again is this a fold for sure?