Instead of the able-bodied partner "helping" the amp (which creates a caregiver/patient dynamic), focus on the amp taking the lead and showing the partner what works. Agency is sexy.
In real medical amp relationships, the limb difference is just one part of a person's life, not their entire identity. If your character is grumpy, is it because they are in pain, or is it just their personality? If they are flirtatious, does their limb difference stop them? Instead of the able-bodied partner "helping" the amp
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