Has she done a pregnancy test? If not she may want to. It's rare to get pregnant at 50 but it does happen. Menopause will sometimes cause women to gain weight around the middle. If she is concerned she may want to see a Doctor.
Is she pregnant? She's 50, she hasn't really had any symptoms but she is gaining weight in her stomach, she always had a big stomach though, but today she said to me that she couldn't zip through one of her jeans. What do you think?