K, small HC moment of this AU. During their early years of established friendship, not yet a marriage, Vox spent his hours working on his plans for his future company, or simply out of a desire to relax, in Alastor's office where he broadcast his Radio show for silent companionship.
Alastor is a man of music, a man of jazz, a man of smooth melodies, so it was not at all a surprise to find a number of considerable musical instruments inside his office, much less when Alastor wasn't torturing victims for his show, he was offering long and pleasant segments of music. It was on one of those days that Al invited him to play the piano he had seen him ogle several times, and that little invitation quickly turned into a very personal ritual for the two of them, a very emotional tradition for both of them, the making of a melodic duet; Vox on piano and Alastor on vocals.
After some time at the hotel, some residents noticed his little penchant for playing the piano. It didn't take him long to invite Charlie and Angel, two residents he is most fond of and watches over the most, to observe one of his routines, and out of obligation, Nifty as well.
It is at that moment that he knows he has really gotten attached to the hotel.