Shooting wide open can sometimes be a bit tricky, as the DOF is very short, so if you don't aim the focus perfectly, you will end up with something that's not in focus. But looking at images, it looks like you have sharpness, but maybe not always where you want it (her eyes). In the first image, the focus plane seem o be just behind her eyes (look at the cheek on the left side, very sharp bumps in the skin). Second image is hard to say, third image seem to have focus on the corner of her eye (the left from us, her right eye), fourth image the focus looks like it's on her right side, by the hair and the furry edge of the coat.
The only image that's out of focus, in my view - peeping at 100% is the last image. But you shouldn't really pixel peep... you'll always see some "softness" then.