We have seen villain play two hands, not enough info to assume Sir Limpalot.
I do agree its a fold though, assuming fold>call>3bet?
We aren"t really folding AJ in the SB if he makes it 225 though are we... he is only 3 seats to our right..
FWIW - I dwelled and decided to call and go heads up to:-
We check call 725. (compounding the error? Assume once we flick it pre, we aren"t folding one pair on the flop?)
Turn:
Check, Check. River is :-
Room for some cheeky value now? Check call for the bluff catcher? Check fold?