Do you think this was out of line?

A buddy of mine's mother was diagnosed with cancer, so he made the four hour trip home to be with family, and he was there for a little over a week. His girlfriend seemed supportive, and he called her at least twice a day to keep her updated. They have been together for ten months, and she has not yet met his parents. Even though she was willing to make the trip, she had her children that she has joint custody of, and they decided she would stay home unless he needed her to come down. (She doesn't have the extra money to spend on hotels, and gas) and she would not accept him paying for it. Anyway, he came back home, and called me that night to let me know everything was as good as it could be, yet his girlfriend was upset and yelling at him. She told him she feels left out, that he didn't "need" her, and that they are not on the same page, and haven't been for weeks. Now, the guys mother and him are extremely close, and he was obviously worried sick about her. I thought about this after I hung up with him. Doesn't it seem out of line to be expressing those feelings she has at that particular time? I mean, the guy has enough to worry about I think.