solve this little riddle. I DARE YOU!?

[kwalther2]

It is a hot August afternoon. The location is the living room in an old Victorian mansion. The 7 foot window is open and the curtains are blowing in the breeze generated by the thunderstorm that just passed through the area. On the floor are bodies of Bill and Mary. They are surrounded by puddles of water and broken glass. Neither Bill nor Mary has clothing on. How did they die?

[Chloe]

The lightning went through the window, hit them and burnt their clothes off? And the rain came through the window?

[rboy]

i dont know