My DD did this too! It used to reduce me to tears on many occassions. I think the fact that she couldn't see me didn't help (as rearward facing). I put a mirror on the headrest so that she could look into it and see herself and also see me. This seemed to help a bit. She eventually grew out of it.

I wonder whether the sensation of travelling backwards made her feel a little sick - you know like travel sickness? Not sure if there is anything that can help with the motion sickness in a bub so young.

Hope it passes quickly for your friend - I know how upsetting it was for me.

Janie xxx