LGP and a block?

[Rob_K]

Let's say one of my guards is on the perimeter and advances towards the basket. His defender has LGP to start, but decides to try for a steal turning his shoulder as he extends his arm. My guard protects the ball and dribbles through him and pushes him back. Since the definition of LGP includes:

ART 2
b. The front of the guard's torso must be facing the opponent.

ART 3
b. The guard is not required to continue facing the opponent.

c. The guard may move laterally or obliquely to maintain position, provided it is not toward the opponent when contact occurs.

Is this an offensive or defensive foul? My position is the defender is moving forward as my guard is driving to the basket which takes him out of the LGP. I'm also curious about the turn of the shoulder if that affects the LGP.