My very first opportunity to prove myself to my owner Mistress W, came on the first night she took ownership of me. I had behaved to her exact commands all day and she offered me an opportunity to orgasm, but if I accepted the offer, I had to cum on my pillow (fold it and fuck it - no hands) and then sleep with the pillow all night long.
Wanting to prove myself, I did as asked. It did not take long for me to decorate the pillow with my cum load - and it was a rather large load. I took a photo of the load and sent to her and she then commanded me to fall asleep with the cum inches from my mouth and nose.
I did as told, waking once during the night feeling something wet on my face - which of course was the cum that I had either rolled into or had it leak onto my face/chin. I woke in the morning to cum smell.
The next night, she had me fetch the pillow-case from the laundry basket and suck on the dried cum stain while I chatted with her.
This is my new life as her submissive - and its only the start.