One possible plot could be that the sisters are on a normal day in the manor when they suddenly sense a strange magical presence. Following it, they find baby Chris. They then have to figure out who he is and why he's there. Maybe they discover he's from the future and they need to protect him from some dark forces that are after him in his own time.
Piper can freeze time. So if they're in a dangerous situation, like being attacked by demons who are after baby Chris, she can freeze time to protect them all. Prue can move things with her telekinesis. She could use this power to create barriers or move baby Chris out of harm's way quickly. Phoebe has premonitions, which might help them foresee any upcoming threats to the baby.
One idea could be that the kiss is a magical accident. Maybe they were trying a new spell and it backfired in a way that made them kiss. This could lead to a whole lot of confusion and self - discovery for both of them as they figure out their feelings towards each other in a new light.
Long - term, if Piper and Phoebe's relationship deepens after the kiss, it could make their bond with the other sisters stronger in a different way. They might be more in tune with each other's emotions, which could help them better support Prue and Paige during difficult times. However, there could also be some jealousy or feelings of being left out from Prue or Paige if Piper and Phoebe become too wrapped up in their new relationship.
Another characteristic is that it usually has a clear theme. It can convey a moral lesson, like many classic prue short stories do. For instance, stories about honesty, kindness, or the consequences of greed often have a very clear message that the reader can easily understand.
One possible Chris Halliwell love story could be that he met a girl at a local coffee shop. She was reading a book he loved, and they struck up a conversation. They quickly realized they had a lot in common, like their taste in music and love for old movies. They started dating and often went on hikes together, enjoying nature and each other's company.
In Wyatt Halliwell fanfiction, the theme of self - discovery is quite common. Wyatt has to figure out who he is in the context of his powerful abilities and his family's legacy. Another theme is redemption. Sometimes Wyatt is portrayed as making mistakes and having to find a way to redeem himself. And of course, the theme of magic itself, like new magical spells or artifacts that Wyatt encounters and how they impact his journey.
I'm not sure which specific novel 'Mrs Phoebe' is from. There could be many characters named Phoebe in different novels. Maybe it's a character created by an indie author or a relatively unknown work.