Professors

She was never able to keep a relationship.
Margot alway seemed to care too little, too much, or was too ambitious for her partners.
She put too much work into her job as a literary professor at Rivermiss High, and too much anger in her arch nemesis, Jade Imran.
And even though Jade is quick to tell her that "Normal people don't have an arch nemesis", they constantly fight and argue, not even stopping to take a breath.
But when Jade shows unexpected interest in one of the other professors at their school, Marge feels something crawl up her spine and strike her in the ribs, and she needs to figure out what /it/ is before Jade can call it what she thinks it is.