Do I really have to concerned about the safety of my kids because their step-parent is publicly posting thoughts about suicide?
That is concerning. How do you think this will affect your kids?
I'm afraid that if something happens to his girlfriend, he will harm the kids by giving them a drug or alcoholic drink.
It is understandable that you ae concerned about the safety of your kids, especially if they are around someone who is considering suicide. You should take action to ensure that your kids are physically safe. This way you know that they will not be harmed.
Do you think I should consider taking the kids away? Would that be going to far?
It might not be. You have to do what is best for your kids and they should be your priority. They need you to look out for them.