Silent Mite - S7-E7
Continuity mistake: In the final scene where Arthur raises his ornament on the Christmas tree, the kitchen door is closed behind him. In the next shot looking out from the kitchen, the door is already open as Arthur walks forward and through it. (00:21:15)
Silent Mite - S7-E7
Continuity mistake: In the final scene where Arthur takes his ornament from near the bottom of the tree and puts it closer to the top, the door to the kitchen is closed. Then in the next shot from inside the kitchen, the door is already open as Arthur walks towards camera. (00:21:15)
Answer: Sara hasn't been mentioned in later episodes, and it suggested in later episodes that she never existed, and that Carrie is an only child. Kevin James stated that the producers couldn't think of an good plots to use with Sara, so they left her out.