Can CPS take my kids because of my boyfriend's past?

I cannot see how, legally, they can take away children who are being fed, bathed, and live in a loving environment simply because your boyfriend had some legal issues nine years ago. They don't have enough foster homes and/or adoptive parents for children who truly need to be removed from a parent's home, and, they know that keeping the family unit together is emotionally much better for the children, so I am almost certain, with no current signs of abuse and/or neglect, they will NOT take your kids. Even if they did raise the subject of his past (let's say he sexually attacked a child and was arrested for that many years ago), to keep the kids, you would just have to remove him from your home and unsupervised contact with the children, and you would get the kids back. Just know that the children - NOT your boyfriend - and their well-being are your first priority, and keep telling CPS that, and you will be fine. Also, stop confiding anything in your mom! She is not trustworthy if she would try this!