Wonder how many children she already had. I’m thinking that you’ve got to be pretty ‘loose’ to drop a baby and not even realize it is happening.
Happened to a classmate of mine back in HS - and yes, it was her first. She thought she was having abdominal pain. (well, guess she was in a way), didn’t realize it was labor. Came on fast and she sat on the toilet..splash and there was her daughter. She was a bit premature, weighed not quite 6lbs.
Not that I wanted to ever have my kids on the toilet but geez, I should only have been so lucky to have labor and delivery that easy!