"Coming to the conclusion that it’s safe enough, Xysmar took the red cloak off S’Altesh's dead body and picked the babe up. He wrapped it fully out of sight, not bothering to wipe the grime off the creature."
Xysmar never had any actual problem with the way Esh was able to change his appearances. But since he was the one who brought the infant to the Matron - enough of disobedience from the child could lead to Xysmar also getting in trouble. Especially if the older drow is spotted being near the boy during the "crime"
And if you are curious about the context, check out Eshra's BACKSTORY












