Start with a small bite

"Sure, but would you mind helping me with mine first?" Al asked. "Of course," Yuzuha quickly replied. While she did not like getting bitten, like most people, there was a positive. Normally, vampires only drink the blood of humans. They can drink the blood of non-humans, however there are often side effects to that. And in the case of succubus blood, it caused increased sexual desire in the vampire. So drinking her blood would make him more excited to have sex with her later.

Al approached Yuzuha and carefully bit into her neck. Yuzuha felt the familiar piercing sensation. She had gotten used to it over the years. What helped was that she didn't have to dwell on it long. Shortly after a person is bitten by a vampire, they will pass out for a bit. Usually, it lasts under half an hour. For non-humans, it lasts less than 6 minutes.

Yuzuha's eyes closed as she succumbed to the bite. Al pulled back from the bite. He saw that his wife was knocked out, so he gently laid her body onto their bed. He could feel himself getting more aroused, as a result of Yuzuha's blood. He had some time before she wakes up. What should I do?