i play live mtts and wanted to know your thoughts on this hand. I started the hand with 10300 i was in the big blind and the blinds are 1200/2400 400 antes and everyone folds around to the small blind and this girl calls. she has alot of chips so i look down at j3 off so i checked figuring she going to call if i shove maybe i can hit someting on the flop and move in. the flop came k67 rainbow she checked I checked behind turn came a Ace she checked and i checked river was a 7 she fires 4500 and i thought for a long time and call. my thinking at the time was she was really agg. because i played with her a few time before so i have some history on her so that being said i think she would have bet some where along the line and not bet when the river came seven. i put her on a pure bluff and if she had a hand like Qj or QT my thinking was she had showdown value and check being that I checked flop and checked river. anyway she rolls over Q3 and i look like a dumb ass. what should i have done raise all my last 3000/ call or fold?