Hermione looked at Draco who simply looked down and nodded in embarrassment. Bellatrix  had then walked over and grabbed Hermione by the hand and transferred them to her secret dwelling. On arrival she had instructed her elf to provide anything Hermione needed and then left. She was muttering to herself about visiting her vault at Gringotts. Hermione had doubts the first couple of days but eventually the regular food and showers made her feel more comfortable. On the second day there the elf lead her to Bellatrix private library. She fell in love instantly and quickly figured out that it was much more comprehensive than the library at school. She decided that if she was going to be a hostage at least she could learn as much as possible in the meantime until rescued or released.