[Justin A]

I think you played the hand brilliantly preflop with whatever you happen to have.

You probably have to 4bet most of the hands in your range at this point on the river. Sean tanking for a full ten seconds is a thinking decision, either a bluff or a thin value bet. Unless he is hollywooding you which I really doubt, his insta 3bet makes absolutely no sense and makes me think that you should 4bet for value any hand that's like A2 or better, and 4bet for bluff any hand worse than a J.