The blood bond between them was a symbiotic relationship. Although she shut him out of her mind when she chose, he taught her how to grow and master her powers. In return he had a - mostly - willing source of blood, and the challenge of attempting - and failing - to control her mind. The sex, when they had it, was amazing, and shared blood heightened the orgasms. There were times she hated him, wished he didn’t exist, but those times were never in bed, and never when they sat, feet hanging off the cliff, watching the city down below.