The Fifth Day of Christmas
For her own sake she had to back off

It hadn't taken Julia long to fall in love with Ivo van den Werff -- but she had better fall out of love equally quickly, she decided, when she met Marcia Jason and realized just how much stronger a claim the other girl had on Ivo's affection.

Heroine: Ivo van den Werff
Heroine: Nurse Julia Pennyfeather