Final answer:
Unable to provide a definite answer without the specific context of the book or story the character Tori is from.
Step-by-step explanation:
Without knowing the specific context of the book or the situation Tori is involved in, it's impossible to provide a definite answer to the question: What does Tori overhear her parents discussing while she is working with her roses?
In literature or reading comprehension questions, such detailed information typically comes from a specific text or story. If this question pertains to a known book or narrative, please provide the name of the text or additional context so an accurate response can be given.