I'm playing against an 85/0 here... he is quite aggressive and chases draws constantly.. so I put him on a flush draw.. is the weak bet on the river small enough for him to be able to push over thinking I'll fold if I'm weak?

Full Tilt Poker Game #980120399: Table Barbie (6 max) - $0.10/$0.25 - No Limit Hold'em - 15:13:21 ET - 2006/09/08
Seat 1: bootstrap1 ($25)
Seat 2: hartlis1 ($24.65)
Seat 3: PERUVIAN PUMA ($19.05)
Seat 4: 63isthebest ($7.80)
Seat 5: Pineski ($9.55)
Seat 6: swingster ($58.05)
PERUVIAN PUMA posts the small blind of $0.10
63isthebest posts the big blind of $0.25
bootstrap1 posts $0.25
The button is in seat #2
*** HOLE CARDS ***
Dealt to hartlis1 [4h 4s]
Pineski has 15 seconds left to act
Pineski folds
swingster calls $0.25
bootstrap1 checks
hartlis1 calls $0.25
PERUVIAN PUMA folds
63isthebest checks
*** FLOP *** [Js 4d As]
63isthebest checks
swingster bets $0.50
bootstrap1 calls $0.50
hartlis1 raises to $2
63isthebest folds
swingster calls $1.50
bootstrap1 folds
*** TURN *** [Js 4d As] [3d]
swingster bets $1.25
hartlis1 raises to $5
swingster calls $3.75
*** RIVER *** [Js 4d As 3d] [3c]
swingster checks
hartlis1 has 15 seconds left to act
hartlis1 bets $4
swingster folds
Uncalled bet of $4 returned to hartlis1
hartlis1 mucks
hartlis1 wins the pot ($14.85)