Antonio and Andrew were giving each other the silent treatment, and the reason was quite simple.
During their routine daily business one day, as Antonio was feeding on the blood from Andrew's neck, for reasons unclear he suddenly got carried away and kissed his way up along Andrew's neck all the way to his cheek. Before Andrew could process what was happening, Antonio tried to push his luck further by attempting to kiss his lips.
In a panic, Andrew jerked his head away forcefully and squeezed his eyes shut as if he found the very sight of Antonio repulsive.
Chapter 151