AQ facing some heat

[maranello11]

This is a live 2/5 NL game. I am in the small blind with AQ three limpers to me I make it 20. Just started so didnt want to blow people out of the water. One caller(he has not really done anything out of control but have played with him before and he is a good thinking player.

Flop: A 6 5 rainbow. I bet 40 he calls.

Turn 6 with club draw. I bet 75, he makes it 175, whats your plan?

We both have over $500 to start hand and I cover him