Toni Langston has been in love with Simon, her best friend, for years. The night Simon breaks up with his longtime girlfriend, he and Toni make love. Toni is devastated and humiliated when, in the heat of the moment, he calls her by his girlfriend's name. The next morning, Simon remembers nothing of the previous night and Toni is only too relieved not to remind him.

Two months later, she discovers she's pregnant. She wants Simon to love her, apart from any obligation he might feel because of the baby. So she embarks on a quest to seduce her best friend, to make him see her as more than a little sister, to make him love her as much as she loves him. It works. Maybe too well. Now when things are perfect, she faces telling him of the secret she's kept.