Well, if they existed, they might include tales of her heroic deeds from her famous roles. Maybe stories of her fighting villains and saving the day, told in a more gentle, bedtime - friendly way.
Sadly, I haven't come across a particular set of 'Lucy Lawless Bedtime Stories'. But you could take elements from her acting career and make up stories. Say, if you focus on her strong and fearless on - screen personas. You could start a story with her character facing a great challenge in a magical forest at night. As she overcomes obstacles, it can be a soothing and inspiring bedtime tale.
Yes. The kiss between Natsu and Lucy is a pivotal moment that adds depth to their relationship in the manga. It comes as a surprise to many but is a welcome development for their love story.
One popular theme is adventure. Given their roles in Xena: Warrior Princess, many fan fictions explore new adventures that the characters could go on. It could be about them exploring new lands or facing new enemies.
The kiss could also complicate things. Maybe they both have different ideas about what the kiss means. Lucy might think it's a start of a serious relationship, while Lockwood just saw it as a spur - of - the - moment thing. This can lead to some misunderstandings and tension between them.