I'm not sure who Abby Steiner is specifically. There could be many people with that name. She might be an athlete, an artist or someone in a local community. Without more context, it's difficult to tell her back story.
Sorry, I really don't have enough information to give details about Abby Steiner's back story as the name is not very specific. There could be an Abby Steiner in different places doing different things.
One great Gibbs and Abby married fanfiction might be 'A Life Together'. It beautifully depicts their daily life post - marriage, with little moments of them sharing coffee in the morning and Gibbs protecting Abby from any danger that comes their way. Another could be 'Married Bliss', which focuses on how their different personalities blend well in a marital relationship.
The Steiner Christmas story could potentially be about the celebration of Christmas in a Steiner - inspired way. Steiner education often emphasizes nature and the spiritual side of things. So perhaps the story involves how nature participates in the Christmas celebration, like the animals being quiet on Christmas Eve as a sign of respect for the holy event. It could also include elements of how children in a Steiner school might prepare for Christmas, such as making natural decorations from things like pinecones and dried fruits.
Susie Steiner in the context of Fantastic Fiction could be a writer who has made contributions to the genre. Maybe she has written some really engaging stories that fall under the umbrella of Fantastic Fiction. It could be that her works have unique characters, interesting plotlines, or a distinct writing style that appeals to readers of this genre.
You can start by looking on fanfiction websites like Archive of Our Own or FanFiction.net. Just use the search terms 'Gibbs and Abby married' and you'll likely find a bunch of relevant stories.
Again, assuming it's Rudolf Steiner, one key event was the founding of the Waldorf education system. This system has had a long - lasting impact on education around the world.
As I don't know the specific 'Steiner Christmas Story', I can't say for sure what the main characters are. It could have the traditional Christmas characters like Jesus, Mary, and Joseph if it's a Nativity - based story. Maybe it also has children as main characters if it focuses on how kids in a Steiner environment experience Christmas.
I'm not sure specifically which works Susie Steiner has in Fantastic Fiction. You could try looking her up on official book databases or literary websites.
Abby's character might become more domesticated. She's always been a bit of a free spirit, but being married could make her more settled. She might start to focus more on building a home and a family life. For McGee, he could become more confident in his personal life. He's often been a bit shy and reserved, but with Abby by his side as his wife, he might find himself being more assertive in social situations. Also, they could both develop more patience with each other as they face the daily challenges of married life.