I check and call and fold... all on the flop

[private joker]

4 decisions in this hand, and I probably screwed all of them up.

Commercial 20/40. Folded to a hyper-aggro girl in the hijack who borders on maniac but doesn't play total crap hands. She'll open any suited A, any two broadway, any PP from 55+, and decent suited connectors. She's probably a 35/25/12. She bets most streets checked to her, she loves to checkraise, and she stabs at any river on a bluff if there's a minute chance she can take it down.

A lot of the pots she wins are by raising one pair on the turn, and a lot of times when she bets the river and is called she just mucks face down. I have a good read on her because I've played with her a lot, and so far tonight I've 3-bet/isolated her with ATo on the button and won w/o a showdown on a T9762 board; I also check-called her on the river (bluff-inducer) with 77 on a T9833 board. She had A-high.

OK, so I probably just wrote too much there. Anyway she open-raises from the hijack and a tight, older Commerce pro (plays stud sometimes, looks like Blair Rodman but isn't) 3-bets her from the CO.

Button folds and I look down at A[img]/images/graemlins/diamond.gif[/img] K[img]/images/graemlins/heart.gif[/img] in the SB. I decide to cap it. BB folds and MP/CO call.

Flop comes down J[img]/images/graemlins/spade.gif[/img] T[img]/images/graemlins/spade.gif[/img] 5[img]/images/graemlins/diamond.gif[/img]. I check, MP checks, CO bets, I think for a while and call, MP check-raises, CO 3-bets, and I fold.

Opinions please on the PF play, and all three flop decisions.