Bodog 100k hand, correct line?

Bodog 100k 100+9
Blinds 5/10, five minutes into tourney, stacks all even except one guy with 20 chips, and the guy with all of that guy's chips, both in MP/MP+1.
Dealt AQo UTG


Raise to 45
UTG+1 calls
MP pushes for 20 chips

Flop
Ah Kd 4c

I lead half the pot, villain calls

Turn
7h

I lead a little over half the pot, and villain minraises.

What is my line from here?