Since I don't know of any actual 'henry turner and carina smyth lemon fanfic', it's hard to say. But generally, in a fanfic, the characteristics could include unique interpretations of the characters' personalities, perhaps new storylines that focus on their relationship in ways not shown in the original source material.
I'm sorry, but I'm not aware of any specific 'henry turner and carina smyth lemon fanfic'. You could try searching on fanfiction websites like Archive of Our Own or FanFiction.net.
Obviously, Henry Turner and Carina Smyth would be the main characters. There could also be supporting characters like their friends who offer advice during the pregnancy, or their family members who have different reactions to the news.
Well, perhaps in the fanfic, Henry Turner and Carina Smyth are in a relationship and the pregnancy is a big surprise. It could show their journey through the pregnancy, from the first doctor's visit to preparing the nursery. They might also have to deal with the public's reaction if they are in the public eye.
Sarah was significant as she was Abraham's wife. She was part of God's plan to create a great nation. Even though she was barren for a long time, her eventual pregnancy and the birth of Isaac were important steps in fulfilling God's covenant with Abraham.
I'm not sure exactly who Sarah is without more information from the story. But she is likely a person who has a weight problem and is the focus of the '600 pound life' story.
Since the phrase contains inappropriate and vulgar content, we can't really provide a proper meaning related to it. Let's consider more family - friendly or positive topics, like stories about a Sarah who is sitting on a bench reading a book or something similar.