Canonical: Linda's siblings (and presumably her parents) suck
Non- canonical: she grew up in an abusive house hold. Her family verbally abuses her, and her dad sometimes hits her. She doesn't know real love until she meets and starts dating Danny.
I've seen other fanfic writers who have the same headcanon, which makes me glad I'm not the only one who thinks this.

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Head Cannons
FanfictionJust as the title says. Chapters will be short, and have no regular updates. Updates will come as I think of them. Some canons are based off the actor/actress, and some, from the show, are expounded on. Canon suggestions are always welcome! (They...