As you recognized in your post, your daughter's
safetyChild safety seats
Home safety
Safe driving for teens
Safety should be the highest priority. Having your son live with his father would certainly reduce the opportunity for inappropriate contact with your daughter. However, there will still be opportunities for these interactions with your daughter and with others, so it is important for your son to get the help he needs to develop appropriate socio-sexual behavior and eliminate inappropriate contact. I recommend that you seek behavioral counseling that is appropriate to your son's
cognitiveMental status tests abilities. In the meantime, as I am sure you are now aware, your son should be supervised closely. It will also be important to teach your daughter self-protections skills. You should talk with her about what type of physical contact is approriate and what type is inappropriate and have her practice what to do when someone attempts inappropriate contact. These skills should involve (a) recognizing attempts at unsafe contact early, (b) leaving the area, (c) notifying an adult. Research suggests that children must practice these skills and that just talking about these situations does not insure that children will perform the skills when the situation arises.