PokerStars No-Limit Hold'em, $1.00 BB (9 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

UTG+1 ($278.55)
MP1 ($366.80)
MP2 ($600.30)
MP3 ($100.90)
CO ($99.50)
Button ($50.90)
SB ($136.90)
BB ($75)
Hero ($99)

Preflop: Hero is UTG with T, T.
Hero raises to $3.5, 1 fold, MP1 calls $3.50, MP2 calls $3.50, 5 folds.

Flop: ($12) 5, 9, 2 (3 players)
Hero bets $9, MP1 calls $9, MP2 folds.

Turn: ($30) 7 (2 players)
Hero ???

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Opponent is a complete unknown here, my PAHUD filter hasn't kicked in yet.

First of all, is it a good idea to bet this flop, considering the monotone nature?

Secondly, what's your move on the turn?