This was to make sure he gets to sleep well and he could tag her harmless since even his father had been tagged harmful to his survival so he had to be extra careful.
Her father was the most harmful of all the people he met in the palace. the thought of the man still gave him the chills. He could see pure evil in the man's eyes as he spoke to him and tried to touch him that night.
He could only imagine that his daughter won't be any different after all she was his daughter and he must have placed her on his side to get information from her as well as control the throne through his daughter.
Before Liam slept, he concluded that he was only overthinking and he could just look it like he did when he met Alessia although the girl was out to kill him on the first meeting they still ended up working together so there was no reason why he could not give this girl to redeem herself from the mark her evil father placed on her.