This episode marks Laura Leighton's introduction as Sydney Andrews.
While Jane is Sydney's older sister in the series, Josie Bissett (born in 1970) is two years younger than Laura Leighton (born in 1968).
It is odd that Sidney is introduced as Jane's sister because in an earlier episode when Jane was pregnant she mentioned that she is an only child and her parents "only daughter". Sidney was created and added as a device to add drama and move the story along.