Yep I'm sub 50kg most of the time and was a size 7 with my first and had no problems. I know of much larger (framed, I don't mean weight) women that have had problems!

If a caregiver use the term "Tear her in half" then I'd be telling her to complain! That's awful!

Perhaps though she has embellished what was said because she felt she had to to justify the reasons why she elected to have a c/sect IYKWIM.