No reads on this guy.

PokerStars No-Limit Hold'em, $0.25 BB (9 handed) converter

UTG ($23.45)
UTG+1 ($21.45)
MP1 ($10.65)
MP2 ($24.75)
MP3 ($15.10)
CO ($16.40)
Hero ($25)
SB ($28.45)
BB ($2.75)

Preflop: Hero is Button with Q, Q.
1 fold, UTG+1 raises to $0.5, 2 folds, MP3 calls $0.50, 1 fold, Hero raises to $1.25, 2 folds, UTG+1 calls $0.75, MP3 calls $0.75.

Flop: ($4.10) 4, 7, 3 (3 players)
UTG+1 checks, MP3 bets $1.5, Hero raises to $4.5, UTG+1 raises to $3

Hero...?