Story will includes elements of « Dumbification, Praise Kink, degradation kink, Strap-Ons, Overstimulation, Cunnilingus, Dominant GwendolineChristie and Submissive you
Everything is consensual and between adults. 

You are  a courier for a delivery service. You spend your day running around the city, delivering high value items or important messages to high profile clients. It is a decent gig, and the pay is good, but it doesn't leave a lot of free time. Checking in with your supervisor, he hands you a large envelope and a custody chain form. You sign the form acknowledging receipt of the package and look at the address... Not too far away, and it is to be delivered directly to Gwendoline Christie. 
This is reader first meeting with Gwendoline. Gwendoline as you your name. Nothing much more than her thanking you for the delivery. 