On page 556 Anita is looking into Avery's mind, and she see's Nadine and Nellie. Two master vampires who constantly fight about who would get to have sex with Avery.

Look at the last two sentences in the fourth paragraph.

"Nadine and Nellie had fought after they had had sex with him. Nadine didn't want to share Nellie on a regular basis."

I thought they were fighting about sharing Avery, not Nellie.... Definite slip-up on Laurell's part.