Hi! Welcome to Pet Talk!!
I'm so glad that you no longer hate cats! They really are wonderful animals, as you noticed when you cared for your sister-in-law's cat.
Many times, it takes a while for a cat to become accustomed to a new home and new people, especially when they are no longer kittens. Your kitty will most likely slowly get used to her surroundings and then begin to bond with you and your husband. You can be sure that, if she has started to cozy up to your husband and knead on his belly, she has already begun this process. Over time, she will continue to bond with the two of you.
As Yorkster pointed out, if you are not going to breed her, please consider getting her spayed. It's really better for her and for you. Even if you are considering breeding her, be sure that there is enough demand for kittens, otherwise you may have trouble placing these kitties in good homes. My cousin encountered this problem when she decided to breed her poodles. Everyone said that they would take a puppy, but when they were actually ready to be adopted, many people changed their minds.
Good luck with your new kitty, and may you have many years of happiness with her!