Rizzo (Stockard Channing)’s Timeline and Summary

Rizzo and the Pink Ladies think they're going to take over the school.
Rizzo meets new girl Sandy, and instantly takes a disliking to her.
She stirs the pot by not telling Sandy about Danny and reintroducing them to one another as a mean-spirited surprise.
She also makes fun of Sandy at a slumber party.
After having unprotected sex with Kenickie, Rizzo argues with him and the two break up.
To make him jealous, she goes to the dance with Leo, leader of the Scorpions.
One of these men becomes her baby daddy. She says it's Leo, but we're not sure if that's true or to hurt Kenickie's feelings.
After somehow losing the baby, Rizzo makes up with Kenickie.
Sparks fly, and not from the cheap Ferris wheel at the carnival.