Opp is 20/17 and has pushed a draw on the turn before. Bet the flop?

PokerStars Game #8076606602: Hold'em No Limit ($0.50/$1.00) - 2007/01/22 - 22:19:33 (ET)
Table 'Alpheratz V' 6-max Seat #4 is the button
Seat 1: SONY888 ($211.25 in chips)
Seat 2: ACzarO ($21.95 in chips)
Seat 3: victor328 ($100 in chips)
Seat 4: littlepotato ($120.25 in chips)
Seat 5: redgrape ($91.60 in chips)
Seat 6: ChilliWilly ($154.95 in chips)
redgrape: posts small blind $0.50
ChilliWilly: posts big blind $1
*** HOLE CARDS ***
Dealt to redgrape [9c 9s]
SONY888: folds
ACzarO: folds
victor328: folds
littlepotato: raises $3 to $4
redgrape: raises $10 to $14
ChilliWilly: folds
littlepotato: calls $10
*** FLOP *** [Jd Td 3h]
redgrape: checks
littlepotato: bets $20
redgrape: calls $20
*** TURN *** [Jd Td 3h] [4d]
redgrape: checks
littlepotato: checks
*** RIVER *** [Jd Td 3h 4d] [6c]
redgrape: checks
littlepotato: bets $86.25 and is all-in
redgrape: calls $57.60 and is all-in