Aaron studying so hard for his tests, labs, including the MCAT, and Andrew subtly dropping off snacks so Aaron can recharge since he rarely leaves his desk or room unless for exy practice.
If Aaron is so busy studying that he forgets to properly take care of himself, Andrew sends in Neil to annoy the shit out of Aaron so his twin is forced to take a break by chasing a smug looking Neil that never passes up the chance to have free reign of taunting Aaron.
The nights before Aaron has to take a big exam, Andrew actually threatens everyone to either be quiet, go to bed early, or vacant the premises so Aaron can sleep. Aaron has no idea Andrew does all that and just thinks it's convenient that he can get a full 8 hrs before taking his exam.