Damian was not sick at all.
The little prince was just pretending.
He had been demanding the audience of Liana over and over again. When nobody bothered to give him a proper answer, he planned to feign his own suffering to draw his father's attention.
" What is it that our little Prince desires? We promise to scan the entire territory to fetch you that! "
The Master lovingly patted the head of the little Prince who had gone on a hunger strike.
" Mama... "
He said, looking straight at Draco and then again turned back.
The Master looked at Draco, who didn't know what he aught to say...