Party 100/200 hand from today

[ggbman]

UTG, who has not gotten out of line yet, open raises 10 handed. Somebody cold calls, i call in the BB with AJs. The flop is AT7r. I check, UTG bets, cold caller folds, i call. Turn is an offsuit jack, and i donk, UTG calls. (I don't really want to discuss any of this, i vary my lines here and am comfortable with this part of the hand) The river brings an ugly queen. Your action and why?