Mixed up apps
Weirdly enough, I know plenty of people who have done the same things as this pregnant woman, but when they were drunk and getting ready for work the next morning. They’ve attempted to set their alarm and then realized when they’ve woken up late, that they actually “set” their calculator instead.
So, the silver lining to this post is that at least the alarm went off on time to get mom to work, even if it did take her longer than it should have done to realize that the calculator app was not going to help rid her of the loud annoying beeping noise.