Jealous Lies — Francine Pascal

Backstabber...

It's pledge season for Pi Beta Alpha, and everyone in the exclusive Sweet Valley High sorority expects Sandra Bacon to nominate her best friend, Jean West. But Sandra's tired of always hearing about Jean's perfect figure, terrific grades, and fantastic cheerleading. The sorority is the only thing Sandra has that Jean doesn't, and even though Jean is her best friend, Sandra wants to keep Pi Beta Alpha for herself.

When Sandra unwillingly becomes Jean's pledge sponsor, she's determined to do everything she can to insure Jean doesn't make it through the pledge period. But how far can Sandra go and still remain friends with Jean?