Complex sentence: The two vampires then proceed to have a sort of sexual intercourse in Akasha's home where they mutually feed on one another, during which time Lestat becomes spellbound by Akasha and is forced to obey her.
Split into simpler sentences: The two vampires then proceed to have a sort of sexual intercourse in Akasha's home where they mutually feed on one another. During which time Lestat becomes spellbound by Akasha and is forced to obey her.