Under Lock & Key, chapter 6, page 11 (Patreon)

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Story by Peculiar Changeling.

For those wanting to read up on the story, you can read previous chapters here:
https://www.deviantart.com/hofbondage/gallery/63524697/under-lock-and-key

For earlier pages of this chapter, just scroll down the history of this Patreon a little. ^_^