If it sounds to you like fear about the actual childbirth process, I would read about how natural it can be and maybe talk to a doula, midwife, or read about pain-free childbirth. It's entirely possible and it can happen for anyone if they release the fears we are taught as women. Many women talk only about the pain of long labors and the horrible things that can happen, but in reality those things only happen about 5% of the time and many times in women with health risks. If it were anyone in my family, I would take them to someone who could do deep visualizations with her if she were open to it. They can re-assign connections in a person's brain to get rid of fear based assumptions. She may have had a traumatic birth herself, or heard some woman talking about something bad that happened during birth.