Block. While the defender did obtain LGP she lost it when she turned her shoulder towards A1, meaning she was moving into her. If the shoulder turn is away, i.e., she's stepping back with her right foot instead of moving forward with her left, then I'd have a PC.

Of course, given her position if she steps back with her right foot A1 goes to the basket with no problem...

And good luck explaining to both coaches why there was no whistle on this one either way.