Lord of the Firesides Sure! Here's the requested content in spun format with synonyms:
Cathy is crazy about Phineas and also Ferb.
Cathy has a soft spot for Finn, and Frank.
Finn Cathy, and also Ferb.
Candy takes delight in being with Philip and Felix.
Phineas has a special place in the heart of Cathy, and Frank.
Candy both Phineas and Foster.
I hope you find these variations helpful!