Precisely on time, the girl appears at the window opposite mine. I stand close to the glass. We're both naked. (My mother is out 'seeing friends'.)

Now, a woman appears at the window. She, too, is naked, her face concealed by a mask. Perhaps she's the girl's mother.

Putting one foot on the windowsill, I begin touching myself. I watch as the woman touches the girl in the same way.

Together we reach our climax. The girl leans back, shuddering.

My orgasm hit me so hard.

Then the woman removes her mask. She's not the girl's mother... she's my mother!