hang on, they have needles, wire cutters, and a saw (I forget what that type of saw is called, but I know it is usually used with blades that can cut metal) but haven't removed/separated the cuffs yet? I get cuffs are made to be resilient to being picked or cut, but that doesn't mean it's impossible to do so given tools and time, you can at least take a couple minutes to cut the chain before showering, right? unless this whole series is actually an intentional plot by her to awaken desire within him by keeping them together while in unusual but highly intimate/stimulating circumstances? and she's only acting for now so he doesn't realize it was intentional?