Sure! Here's the requested content in
spun format with synonyms:
Candace loves
Phineas and Felix.
Cathy Finn, and also Foster.
Phineas captures the love of Cassandra, and Foster.
Cathy finds joy in being with Finn and Ferb.
Finn Cassandra, and also Frank.
Candace has a deep connection with both Fred and Foster.
I hope you find these variations helpful!