The conversation took place as result of a television show. To reach your conclusion one needs to know the date and contents of the television show and the context in which the conversation took place. If in the show they hadn't yet reached the part where they pulled Quinlan's life-support, the quote makes just as much sense as if they had not yet pulled her life-support in the real-world.
Is there something else upon which you base your conclusion that Mrs. Schindler is a liar?
The TV show was a TV movie. I don't recall the name and details, but it was found to be quite clear that Mrs. Schiavo's statement was NOT truthful--either intentionally or not.
Even she acknowledged the error and changed the age to 11 or 12 in her testimony. So take up the argument with her.