Poor little bub My DD did this too on longer trips. So I was alright, I never went far, but when we went into town or to visit family it was horrible! I used to sit in the back with her but that didn't always help, sometimes I'd just end up crying with her It got to the point that DH hated driving anywhere with her because he was always driving when it happened.

I think she was about 3.5 months when it just stopped. I don't really know why it stopped. I guess she was more able to play with the toys I gave her, and look around a bit. She really likes the mirror on the headrest (got ours from RAA). Timing car trips helps too if it's going to be a long one - family is 3-4 hours away, so I feed her and we leave just as she's ready for a nap.

Good luck to your friend, I hope it passes soon!