Its a bad situation, becuase you want to be careful in that hand becuase there will be a showdown with the maniac regardless of what you and utg2 does, and you don't want to give to much informaiton.
The only other way for you to win the hand is to shove on the flop after he raises you. BUt he has more than thirty percent of his stack in after he raises you so he may make a crying call. A lot of bad players now adays automatically put you on ak when you re-raise preflop.
Multihanded I'd check the flop. you have about 10% of your stack so not a huge lose.
But its better than building a big pot with ace high.
The way he played it I think he had a read on you he thought you had exactly what you had, or he's a level 1 player, he was trying to build the pot with his crappy two pair. Or so it seemed, the turn shove makes it seemed like he read you for a big ace. He was standing behind you with your pants between your ankles
The turn shove makes the pot 1082 if I'm calculating it right you need 435 to call with a pot of 1082. 1082/435= about 2.5 to one pot odds. with no implied odds and you have about a 10% chance of winning the hand. NEVER MAKE THIS CALL.
RECAP, either this guy had a read on you or he's a level 1 player playing redonkulously.
Dont bet the flop, this guy overplays he's hands and he wants to give you his money. Wait for a better hand to build a big pot with.
I'm new to cash game and found you can't continuation bet as much as you do in touranments in cash games. Its no limit these flops grew expotentially, All in takes is one bad hand in a no limit cash game, and your whole night was a waste of time.
You probably bought in for 500 built it to $885 and lost most of your profit on this hand with ace high.
I might even not reraise considering the maniac is supposedly trying to leave, and ak hits the flop 1/3 of the time. so one of you is going to hit the flop and most likely not you. 2/3 chance it will be someone else