My mom wont throw out lilies

This is more or so to rant, my moms birthday was last Wednesday and I knew cats weren't supposed to eat or lick lilies but I didn't pay attention to the flowers she received since me or my cat never go to the living room let alone any flowers until she got relatively close to the (what I now realized) lilies and I immediately moved her she was near there for like a second but I washed her, and it's been over a day and she's eating, drinking, and being her usual self but since then I've locked her in my room because my mom is refusing to throw out the lilies that are in the living room or at least move them to her room. Im just so annoyed because I told her everything about lilies and cats yet she's mad at me because I want her to throw the flowers out. I do not want to put my cat at risk and we don't have the money to help my cat if she ever experiences poisoning and I feel horrible locking my cat in my room. Can I even convince her to throw them out at this point?