Is this a bit brokeback?

No real reads on Chi_Gan after 23 hands he was running at 61%/0%/(46). I have been running a bit cold and couldn't stomach paying off the 9. I also had more callers pf than I hoped for (should of raised more with all those limpers, about $1.5 or so). Is the fold a good move....

PokerStars No-Limit Hold'em, $0.25 BB (6 handed) FTR converter on zerodivide.cx

SB ($5.25)
BB ($14.20)
UTG ($4.10)
MP ($8.40)
CO ($2.40)
Hero ($24.40)

Preflop: Hero is Button with A, A.
UTG calls $0.25, MP calls $0.25, CO calls $0.25, Hero raises to $1, 1 fold, BB calls $0.75, UTG calls $0.75, MP calls $0.75, CO folds.

Flop: ($4.35) 2, 9, 9 (4 players)
BB bets $1, UTG folds, MP raises to $7.4, Hero folds, BB folds.

Final Pot: $12.75

Results in white below:
No showdown. MP wins $12.75.

Raise to around 8xBB preflop with three limpers in front probably.

BB's bet is probably trying to take down a big pot for cheap, and MP's raise is all in I believe, so he probably doesn't have a 9 to make an all in move suddenly like that. I probably flat call and assume that BB folds most times as he is trying to take the pot down more often than he has a 9.

You are right about raising more preflop....limpers tend to call a 4xbb raise all day. As for the flop...do you bet out trip nines this hard? I have seen the occasional player do it if he has been drawn against a couple of times in a row and therefore overbets to take the pot down now. With seeing so many flops, this guy could have just about anything. Most likely holdings 2X, flush draw or PP (with a small possibility of a nine)....but for the most part I think you are way ahead (I think he has a flush draw....hence the all in). I would call here (I would have been more worried about the BB yet to act behind you).