Piercing is always working
Just take her to a Piercing Studio and tell her you get her Tattooed in a visible place...Something like "Disobeydiant Whore".... She will be shocked... then she will beg.... afterwards you can be "mercyful" and get her clit pierced instead and every time she doesn't obey you can attach a string on it and pull her behind you like a dog.... even when shopping, noone will know....
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