That's because she's looking at the screen instead of at the camera, and your image may be in a corner depending on how she has it set up. I'm incredibly guilty of this when I'm teaching online live. Your instinct is to look at the screen because that is where you see the faces, but the camera is in a different spot.Unless I very deliberately force myself to look at the camera, my eyes are always in the wrong place. Try to cut her some slack on that one. It's quite possible you are actually doing the same thing and don't realize it.