Linda Challis, played by Nancy Loomis, is a character from the film Halloween III: Season of the Witch.
Linda is constantly annoyed by Daniel. His alcoholism and lack of being there for the children was a problem. Seemingly every time he was supposed to pick up the kids something happened that was out of his control, preventing him from doing so.
When Dan calls her to warn her about the masks, asking her to throw them away, she angrily hangs up on him, assuming he's drunk again.