You, know it's interesting to look closely at that photo of the girl standing at the back door, the one from further away.
These guys are massive slobs. There is junk laying out all over the yard and a rug draped over the top railing.
Now look at the second step. Looks like a jumble of rags left on the second step, and a beer can on the third.
The accuser, walking on only one high heel and one bare foot, must have taken one step onto that second step and trying to balance everything she was carrying and perhaps even talking on her cell phone (unclear from photo) tumbled head first down those steps, causing injuries.