River play with overpair

[Dory]

I have been questioning a lot of my river decisions recently. Here is an example:

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

SB: $103.75
BB: $166.00
UTG: $312.15
Hero (MP): $100.00
Villain (CO): $82.30
BTN: $110.80

Reads: <font color="blue">Villain is 52/14/0.5. I haven't seen him do anything that isn't obvious in those stats. (Limps a lot, very passive)</font>

Preflop: Hero is dealt A[img]/images/graemlins/heart.gif[/img] A[img]/images/graemlins/diamond.gif[/img] (6 Players)
UTG folds, <font color="red">Hero raises to $3.50</font>, Villain calls $3.50, 3 folds

Flop: ($8.50) 4[img]/images/graemlins/spade.gif[/img] 5[img]/images/graemlins/spade.gif[/img] J[img]/images/graemlins/club.gif[/img] (2 Players)
<font color="red">Hero bets $6.00</font>, Villain calls $6.00

Turn: ($20.50) 6[img]/images/graemlins/heart.gif[/img] (2 Players)
<font color="red">Hero bets $15.00</font>, Villain calls $15.00

River: ($50.50) T[img]/images/graemlins/spade.gif[/img] (2 Players)
Hero ???

This one felt awkward. I think I like a bet/fold as this gets value from Jacks, and costs about the same as check/calling if I am up against the flush. How bad is check/call?? Can I check/fold?

I am just really lost on what I should be thinking about in situations like this, so any general comments on the types of things to factor into river decisions on boards like this would be great.