Cats are social animals, and two tend to do better than one. In fact, if the new kitty is more comfortable around humans, Chloe might feel more trusting, too. Cats are VERY observant of their surroundings. Bless you for rescuing Chloe, I am so sorry that she had to endure abuse, and I am so glad that you have given her a better life!
My situation was a little different - I wound up getting 2 kittens that were fearful of humans. In fact, my hubby took them in when I was out of town - you couldn't tell there were kittens in the house, except for an occasional mew. I lured them out with wet food, caught them & locked them up in the bathroom for a few days. I would sit by the food dish, and worked my way up to petting them the first night, then brought JC in and would pet him in close proximity of the kittens (JC is very friendly, Joey start off by introducing himself with a hiss, in case anyone has any doubts of whether or not he's a pushover
). The kittens would observe from a distance, but seemed to really take a cue from JC's purring & obvious pleasure and by the 3 or 4th day, were much more approachable & began to sit on my lap for petting (I'd have to catch them, and press them down on my lap & get them to relax) - now they can't get enough!