So this wonderful fill: http://hhanon.livejournal.com/574.html?thread=2078014#t2078014 convinced me that Dr. Beatty shoved Nelson's corpse into the brandy as a passive-aggressive move since Hardy loved Nelson and Nelson never returned Hardy's affection while Dr. Beatty could never get Hardy to look at him.
In short: Beatty wanted Hardy; Hardy wanted Nelson. It's a love mess where no one got to be together. Beatty hated Nelson for ignoring/hurting Hardy.
one-sided Nelson/Hardy one-sided Beatty/Hardy lust, revenge
In short: Beatty wanted Hardy; Hardy wanted Nelson. It's a love mess where no one got to be together. Beatty hated Nelson for ignoring/hurting Hardy.