Preflop
Your 3-bet is very large. As a default I would go a bit smaller especially with aces and against an already oversized 4BB open. However if you had some kind of read, that this was a maniac player, or he was using staggered bet sizing, then its obviously find to size up and get more value, when you have the nuts.
Flop
An undersized donk bet is usually a weak hand trying to see the next card cheaply. Maybe 5% of the time its a trap similar to, when people go for a check-raise. I basically just ignore such a bet and pretend, that he checked. You have aces in a pot, where the SPR (Stack to Pot Ratio) is a bit less than 2, and its a fairly clean board without any flopped straight or flush possible, and only one of the possible 2 pair combos makes any sort of sense in a 3-bet pot.
The only thing, I am concerned about in such a situation is, how can I get my stack inside in the most profitable way? And I think, betting flop and jamming turn is a totally fine line here against someone, who is shaping up to be perhaps a little bit fishy given his weird sizing and actions. So I would make it around 1.800-2.000 to go on the flop and then jam basically all turns, if he comes along for the ride.
If he comes over the top and jam on the flop, I am not loving it, because that line is a bit skewed towards a strong hand. But I am never going to fold aces on this flop. If he cracked my aces already or gets there on the turn or river, then good for him. It does not worry me at all, and I just reenter or play another one.
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