Sure! Here's the requested content in spun format with synonyms:
Cathy loves Finn and Foster.
Candy has strong feelings for Fred, and Frank.
Fred holds a special place in the heart of Candy, and also Foster.
Cathy being with Philip and Ferb.
Fred has a special place in the heart of Cassandra, and Foster.
Candace shares a bond with both Finn and
Frank.
I hope you find these variations helpful!