One possible fanfiction plot could be that Diego is overly protective of Shira during her pregnancy. He scares away any potential threats and constantly hunts for the best food for her. Shira, on the other hand, is getting impatient with his over - protectiveness but also secretly loves it. And they both start preparing a den for their upcoming family member.
A fanfiction idea could involve Diego and Shira's relationship. They might have an argument over how to protect their group. Shira could think Diego is being too overprotective, while Diego believes Shira is taking too many risks. But in the end, they realize they both have the same goal and make up, strengthening their bond.
In a fanfiction, Diego and Shira could be on a mission to save a group of baby animals that got separated from their families during a big ice storm. Along their journey, they share their past experiences with each other. Diego tells Shira about his time with Manny and the others, and Shira opens up about her own struggles. This sharing brings them closer together.
One possibility could be that the story focuses on how Diego and Shira prepare for the arrival of their baby. They might face challenges like finding a safe place in the ice age world, gathering enough food, and protecting their future cub from other predators. Maybe they'll get help from their friends, like Manny and Sid.
Maybe the fanfiction could focus on how their relationship changes during the pregnancy. Diego becomes more tender and loving, and Shira becomes more dependent on him in some ways. They could also have some arguments about how to raise the cub. For instance, Diego might want to teach the cub to be a fierce hunter from the start, while Shira thinks it should first learn to be gentle and kind. These differences in opinion add some spice to the story while they are waiting for the new life to arrive.
Manny would probably be very supportive. He might offer them a place to stay in his herd's territory for safety. Sid would be excited and maybe a bit too eager to help. He could try to bring them strange things he thinks are useful for the baby.
Diego and Shira would probably raise their cubs to be strong and independent. Diego, with his experience as a saber - tooth tiger, would teach them hunting skills. Shira, being a tough female, would instill in them a sense of self - reliance.
A fanfic could focus on the relationship between Diego and Shira. Maybe Diego wants to show Shira a special place he found in the Ice Age wilderness. It could be a beautiful hidden valley with warm springs. Along the way, they talk about their pasts, how they became the tough sabers they are now. And at the end of the journey, their bond grows even stronger.
One possible scenario in a Diego and Shira love fanfiction could be that they start off as rivals in the ice age world. Diego, being the more serious and protective type, initially sees Shira as a threat. But as they face various challenges together, like fending off other predators or surviving a harsh winter, they gradually develop feelings for each other. They might share secret glances and small acts of kindness that slowly build into a deep love.
They could be on a quest to find a special herb that has healing powers. This herb is said to be in a very dangerous area filled with deep crevasses and fierce predators. Diego and Shira would have to use their skills and rely on each other to get to the herb.