A possible plot could be that the baby is in danger due to Irene's past enemies. Sherlock has to use all his skills to keep Irene and the unborn child safe. Along the way, they both realize how much they care for each other and the future family they could have together.
Perhaps Sherlock discovers Irene is pregnant through his brilliant deductive skills. He then decides to take on the role of protector, which is a big change for him as he's usually so detached. This could lead to a whole new dynamic in their relationship, with Sherlock learning about emotions he never knew he had.
One idea could be that Irene tries to keep her pregnancy a secret from Sherlock at first because she's not sure how he'll react. But then as her pregnancy progresses, she has to rely on him more and more, leading to a new level of closeness between them.
Perhaps in the fanfiction, Joan's pregnancy is a result of a scientific experiment gone wrong. Sherlock then uses his intellect to find a way to ensure the pregnancy progresses safely. They could face opposition from some of their old foes who see the baby as a weakness or a new weapon to use against them. Another plot could be that Joan decides to keep the pregnancy a secret from most people, but Sherlock accidentally reveals it, leading to a series of comical and heartfelt moments.
Perhaps in the fanfiction, the pregnancy is a result of some kind of experiment gone wrong. Sherlock then has to use his brilliant mind to figure out how to ensure the health of both Molly and the baby. He might have to face his own fears about becoming a father and how it will change his life and relationship with Molly.
One interesting fanfiction could be where Irene Adler teams up with Sherlock Holmes to solve a mystery that involves international art thieves. In this story, their initial attraction turns into a deep respect as they work side by side, using their unique skills to outwit the criminals.
One idea could be that Natsu and Irene are forced to team up to defeat a powerful dark magic user. Their opposing personalities at first create conflict, but as they face challenges together, they learn to respect each other's powers.
One idea could be Irene somehow being redeemed through her interactions with Natsu. Maybe she gets a second chance at life and has to learn to be a better person with Natsu as her guide. Another plot could involve Natsu and Irene teaming up against a common, extremely powerful enemy. They start off distrusting each other but gradually come to respect and rely on one another.
Sherlock might become more empathetic. His logical mind would still be there, but he'd start to understand the emotional side of things more deeply, especially when it comes to Irene's pregnancy. For example, he'd notice her mood swings and try to comfort her in his own unique way.
One idea could be an OC who is a brilliant scientist that crosses paths with Sherlock and Watson while working on a top - secret experiment. The OC's knowledge could either complement or conflict with Sherlock's methods.
In some fanfictions, it could show Irene Adler getting support from unexpected allies during her pregnancy. Her pregnancy might also be a catalyst for change in her relationships. For example, if she had a rivalry with Sherlock Holmes, her pregnancy could lead to a truce or a different kind of dynamic as Holmes might see her in a new light, that of a soon - to - be - mother, rather than just a foe or an enigma.
Yes, there is. Some fanfictions might explore their relationship in different scenarios. For example, they could be in a world where Holmes has to protect Adler from a new, dangerous criminal. In these stories, their initial attraction and the tension between them are often elaborated on, adding new layers to their relationship as seen in the original works.
Maybe the OC is on a quest to find a cure for a curse and Irene Belserion, in her spirit form, appears to guide the OC. The lemon could be a symbol of purity in this story. The OC has to use the essence of the lemon in a magical ritual along with Irene's guidance to break the curse.