No. Chase UR points are controlled by Chase. AA miles are not controlled by Citi, they're sent by Citi to the cardhoilder's AA account automatically. And AA itself does not allow free sharing (they do have something called "sharing", but it's almost as expensive as buying miles in the first place!).

But you can get 40k from a US card from Barclay, 53k from an AA personal card from Citi, and also (wihtout actually having a business) 53k from an AA business card from Citi, and you'll then have 146k (by mid next year, when US and AA miles combine), more than enough for two people one way in business. And each of you can do this. And so if you want to go both directions using AA miles, one of you can book the one-way outbound for both of you, and the other of you can book the one-way coming back for both of you. And you'll both still have AA miles left over.

(53k = 50k bonus on $3k minimum spend, plus the normal 3k on that $3k spend).

And, btw, unless you only want to do one trip ever, it's good to have miles left over from one trip, as that gets you a head start on your next trip. You cannot repeat these signup bonuses all that often (12 to 28 to 26 months for the Citi AA personal 50k for each person, perhaps about the same for the Citi AA business 50k for each person, and the US card from Barclays will not be availble for new signups by mid next year). But the earlier you get them the first time, the earlier you're ready to repeat for a future trip.

Just know how to keep your miles expriing in each program that you have them in, and you'll always be able to use leftover miles from one trip for some future trip.