Season 2 Episode 4 Scene 4 Depth
Feeling embarrassment at having such melodramatic parents, Susan nodded with a scowl
"A school.pep rally would be more relaxing. Let's go"
She packs up her books and leaves the house with Allure. She was tempted to say something snarky as she left, like "were leaving so you two can fight in private", but chickened out and just left a note that she was leaving to study at Allura's (or, she told the maid, whichever was more convenient)