"For sale: baby shoes, never worn..."

The mom and dad are expecting twins (one boy and one girl). So they bought some shoes cause they were going to be born in the winter time. One day in the middle of a blizzard the mother started going into labor. After the husband unbarried the car he and his wife rushed to the hospital. Upon arriving the mother had both of her kids. Both were healthy and perfect little angles. There was just one smallish problem. The parents had bought shows for one girl and one boy. Well the doctor was wrong and the mother had two boys. So they are currently trying to sell the girl's shoes on eBay.