Tamamo No Mae (from Monster Girl Quest) Her true/adult form. being fucked like this.
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It will be a male, Luka, but he does not need to be drawn all in. give him a large cock, but not massive like that thing has.
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some examples of Tamamo, the first one shows her clothes if you want to draw some of that on her, if not nude is fine (ps, do not forget her tribal tattoo's and head accessory)