Story will includes elements of : Dumbification, older woman with younger man, man reader self insert Praise Kink, degradation kink, office sexe, Strap-Ons, pegging, high heels kink (reader find woman in heels irresistible and sexy), 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 your first meeting with Gwendoline. Nothing happen more than her thanking you for the delivery.