Not sure if this qualifies for high stakes, please move if it doesn't.

Estrellas 1.1k Main Event. Blinds 100/500/1000. Table is currently 8-handed. We sit on a stack of 107k. Table just witnessed us showing down AA in a relatively large 3b pot, when we squeezed an utg1 open and mp flat from the HJ. Our image with the players involved is tight and clean - I've spewed before though :D

On to the hand: Tight HJ openraises to 2.2k from a 26k stack, he looks weak though as if he is trying to steal from the very tight blinds, who both have around 12-14bb.

New Player in CO 3b to 5.8k. He is ~70bb deep. We notice his shaking hands and see 88 after checking our hand. We take a look at stack sizes in front and behind and 4b to 12.8k since reads and its such a sweet spot (imo).

Obv im happy to get it in vs the blinds and will fold if CO piles. I'm aware CO committed himself against the.blinds and hence.cant be too light. However, I think we can make a lot of hands fold HJ and CO might have that either have us crushed or we'd flip against, i.e. not sure if I'd pile AK in COs shoes.

Appreciate your thoughts on this spot and also 4b sizing.

Cheers