Sean,
I am a flight attendant and this is what happened to me. MQAAord pretty much hit it on the head. With my company, they held an open house. In that open house, the rep went over the company, the pay, the reserve period, and basic QOL for reserve and line holders. She pretty much told us everything that we needed to know that would make us second guess wanting to be a flight attendant and said plenty of times during the session that if it wasn't what we could see ourselves doing considering the ups and downs, then we could leave at any time. Of course, some people left. They also have you introduce yourself and read a few lines off of an announcement. This was to gauge how well you can read and present yourself in front of people. From there, if you made it to the second round, you were invited to a one on one interview. If you passed the interview, you got sent to the main base to get medical stuff done and then received your dates for your training class which for us was a month long. From there, you do your IOE and start on the line as a reserve. Hope that answered some of your questions if not all. If you have anymore questions about it, I would be glad to answer them. Just shoot me a PM. Best of luck to your wife.