It was too late when Murphy realized that there was a different taste in Lady Adel's blood. Once the blood ritual commenced, it could not be halted halfway.
Because essentially, it is not merely an exchange of blood.
The ritual involves a unique reproduction pattern of the vampire lineage, which is notoriously difficult to stop once initiated.
Suppressing the confusion in his mind, Murphy drank three large mouthfuls of virgin's blood as a "gift" to his superior. He then rose, lifted his left hand, touched his index finger to the bite mark on Lady Adel's neck, and extracted her blood incessantly using the vampire's control over blood.
His finger covered with dark spiritual energy prevented the hot blood from falling. Instead, as he held it in his palm, it changed its form like a non-Newtonian fluid.
This seemingly cool process required the complete submission of the ritual receiver, else, the process would not be so smooth with even the slightest resistance.