So I capped AQo pf, and 3 bet the flop with overs...

[Hyperrrprank]

Is the button capable of laying down here or on the turn? If so I like the plan. If this is one of those maniacs that calls down and shows his crap hands I'm not so fond. If CO is holding a worse Ace you want her with you. If she's got a pocket pair or straight draw in hand you want her out (and J or 9 obviously, but those are less likely to go away). If you're not sure what she's playing here the safe move is to force her out. If the flop 3-bet won't move her I'd call the flop raise planning on raising the turn.

Bottom line: If you're taking a stab at the maniac with Ace high, you NEED to get it heads up or you're just spewing chips. The weak-tight player is the absolute WORST person to have trailing along here.