What was Meg?

Jo was going to be writer, Amy was going to be an artist and Beth was going to be a musician. My question is, what was Meg going to be? During the movie, I thought that when she prayed for Beth (first sickness) that she said she would devote her life to God if only Beth survived. I took that to mean, she would become a nun. Beth survived, but Meg did not become a nun, instead she became a devoted wife and mother of twins.