flop decision OOP

[avidlearner]

40/80 live game. i had a streak where i had KK three times and pounded the hell out the hands. i also 4 bet AKo twice and didnt show my hand either time.

villian appears to be a young pro. he made a turn call against me earlier that was a tough one. he probbaly views me as LAG.

he opens in CO, i 3bet with AJ diamonds in SB, BB folds, he 4-bets me and i call.

flop is low cards and has one diamond..i check, he bets...

10-1, given my image this is a standard call...correct?

what if i just sat down?

how do i want to play an ace turn? jack?