That was an interesting article. I felt really sorry for my sister.
I will start by saying that I was in high school and still living at home, so we were together all the time. In the first trimester when I had an upset stomach she would be the one in the bathroom emptying her stomach. Poor thing, she is actually my younger sister and was only twelve at the time. She also got the heartburn right along with me in the third trimester. The other symptom she had was actually pretty funny. Where I didn't crave anything odd, just refried beans all the time, she craved and ate wierd things. One of her favorites was a hot dog (which previously she hated) on the bun with nacho cheese and m&m's. Anyways, that is what I can remember off the top of my head.
I actually found it rather nice to have someone to share things with, after I realized that it really wasn't a cry for attention.