Tyrion Lannister could be involved. He was close to Daenerys and had a relationship with Jon as well. He might be the one to help protect the baby or offer his wisdom in raising the child. Another character could be Ser Davos. He was loyal to Jon and would surely be interested in safeguarding the future of Jon's heir.
In such a fanfiction, the story could be about their baby being a symbol of hope and unity. The baby might inherit the best traits of both Jon and Daenerys. Maybe the baby has Jon's sense of honor and Daenerys' leadership qualities. It could also bring the two families and their followers together in a way that was previously thought impossible.
Their relationship would likely become even stronger. Having a baby together would create a deeper bond between them. They would be united in their love for their child and more determined to protect each other and their family.
Well, in some fanfictions, the baby could be a symbol of hope. As Jon and Daenerys' child, it represents the union of two powerful houses. The baby might grow up to be a great leader, trained in both the ways of the Targaryens and the Starks. It could bring about new laws and a more just society, learning from the mistakes of the past rulers in Westeros.
One idea could be a story where Aemon grows up in a world trying to heal from the previous wars. He has the combined traits of Jon and Daenerys, being both strong - willed like his mother and having a sense of honor like his father. He could be on a journey to discover his own place in this new world, facing challenges from those who still hold grudges against his parents' union.
Often, their relationship begins with a bit of tension. Daenerys is a strong - willed queen, and Jon is a respected leader in his own right. But as they get to know each other better, they start to see the good in one another. Their relationship could develop through conversations around a campfire, where they share their dreams and fears. And as they become more intimate, they start to rely on each other more, both emotionally and in the political games of Westeros.
One idea could be that the baby is born with a special ability, like being able to communicate with dragons even more so than Daenerys. Maybe the baby's presence unites the remaining kingdoms in a way that Jon and Daenerys alone couldn't. Another thought is that the baby becomes a symbol of hope for a new era, with people from all over coming to see the new heir of the Targaryen - Stark line.
Allies could include the remaining Stark family members. They would surely support the baby as it is part Stark through Jon. The Unsullied might also be allies as they were loyal to Daenerys. As for enemies, Cersei's remaining supporters could be a threat, seeing the baby as a rival to any power they might still hold. Also, the Night King's followers (if any still exist) could see the baby as a new target, a symbol of the new life they oppose.
One of the best moments can be when they first realize their feelings for each other. In many fanfictions, it's a moment of intense emotion and self - discovery. For example, when Jon sees Daenerys in a new light during a battle strategy meeting. He notices not just her as a powerful queen, but also as a woman he could love.
One great 'Jon Snow and Daenerys Love' fanfiction is 'A Song of Ice and Fire's Love'. It beautifully weaves their individual storylines together into a passionate love story. The author really captures their personalities well.