Sissy Davina's continuing punishment as she is made to ride her exclusive toy. See previous post for how Sissy D got to this point

Any engineering sissies who want to pick fault with the mechanism can if they want to make Mummy D more cross. Its what's called a feasibility study to be passed through to marketing dept for initial approval for further development.
Just think of yourself mounted and riding for the next 3 hours. ENJOY
Love D xxxxxxxxxxxxxxxxxxxx