Very nicely done! The wall!frottage was quite hot. I enjoyed the reveal - even with the first person POV, it still took me quite a while to suspect it was a fantasy being enacted by an established couple!
I like Ollivander's POV - he's quite dramatic at the beginning, and that makes a lot of sense, especially after the reveal. And it stands to reason he'd be a kinky one.
The banter at the end is quite cute, too. I really loved this line:
"Yes, I do..." he admitted as though daring me to object. "...on all of your movements, Mr. Ollivander."