Is this a bare ace bluff or just retarded?

[AZK]

2 limpers, I limp with AJTT (JTs and the Ace is [img]/images/graemlins/club.gif[/img]), 1 more limper or so.

Flop comes T96 all [img]/images/graemlins/club.gif[/img]

someone in EP bets 30 (1/2 pot) I raise pot, he calls.

Turn 5o

He donk bets 50, I call

River 2o

He donk bets 50, I raise pot.

On the flop I was trying to protect my hand? does that exist? Or maybe just make a smaller flush or straight fold, would they? Those ideas are contradicting, so what am I trying to do here? One thing is for certain, I'd rather play heads up than multiway, so good raise right?

Turn, I am calling to fill up. Maybe he's value betting me with a non-nut flush or the straight.

River, he doesn't have the nut, and really looks like he is scared, so who can possibly call a potsized raise, right?