Oh, well-done -- perfectly IC and creepy in just the right ways. Of course Gellert would be a voyeur; it's such a power trip. I almost feel sorry for Albus.
Lines and insights I liked:
Gellert was partial to the shame. Such a powerful emotion – and with so much power over people.
The man was far more transparent than he thought. Gellert liked him, but it was starting to wear him down; along with Albus' annoying tendency to romanticise some things – a disturbingly growing tendency at that/ Several good things going on here -- not only do we get a perceptive look at Albus (he does romanticize), but we also get to see Gellert's chilling sense of superiority; his notion that other people are not quite as real as he is.