Rohan’s Tough AA Spot

This hand is Rohan’s, it seems like a really tough spot to me. Advice appreciated! Villain is 20/9/2.8 over 200 hands. Very confusing spot (for me anyway). There is no reason for him to think my hand is not a monster, ive raised from UTG and then bet out into a 3 way pot. What hands do you think the villain is raising in this spot, what is your action on the flop and plan [...]