This happened in Vegas and yes, the woman in the house was home alone.
The woman's husband was away but was able to remotely speak to the creep through the intercom, at which point the bad guy told him to tell his wife to open the door so he could rape and kill her. He said he had a gun and a knife.
Imagine if he had kicked down the door. At that point, it would have been either him or her, and a gun would be pretty much the woman's only hope.
Thank God, nobody was hurt, and the creep was arrested.