She doesn't appear onscreen, and has only one line in her lone appearance, "Veronica, Dinner!" to which Veronica said, "Don't call me that! Call me Trixie! I'M TRIXIE!".
Trivia
Veronica's mom is the only parent who doesn't barge into her child's room, saying "I'm both respecting your privacy by knocking but asserting my authority as your mother by coming in anyway!".