NL 0.25/0.5$ 10 players

Dealt to Hero in MP2
:Jc::Jh:

SB post 0.25$
BB post 0.5$
UTG calls 0.5$
folds
Hero raises to 2$
folds
SB raises all in for 3.25$
BB folds
UTG calls 3$
Hero reraise 9$ (remaining stack 40$)
UTG calls 7.5$ (remaining stack 120$)

Flop
:Kh:

UTG checks
Hero

How much do I bet here and how do I continue?
Read on UTG: Agressive, confident, plays any two cards, capable of bluffing and trapping, had been dominating the table for a while,