Sure! Here's the requested content in spun format with synonyms:
Candace is crazy about Fred and Foster.
Cathy has a soft spot for Philip, and also Foster.
Fred has won the affection of Candace, and Foster.
Cassandra revels in being with Fred and Frank.
Fred has a special place in the heart of Cassandra, and Ferb.
Candace both Fred and Foster.
I hope you find these variations helpful!