Dont pay, they are lying. The mail contained false information.
I got the following email:_x000D_
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_x000D_
..._x000D_
I made a screenshot of the adult sites where you have fun (do you understand what it is about, huh?)._x000D_
After that, I made a screenshot of your joys (using the camera of your device) and glued them together._x000D_
Turned out amazing! You are so spectacular!_x000D_
_x000D_
Im know that you would not like to show these screenshots to your friends, relatives or colleagues._x000D_
I think $700 is a very, very small amount for my silence._x000D_
Besides, I have been spying on you for so long, having spent a lot of time!_x000D_
_x000D_
Pay ONLY in Bitcoins!_x000D_
My BTC wallet: 1AhBGXXN5YbPE9hUauCRyKSnoLG1FqrKR8_x000D_
...