I'm having a hard time allowing my 5 year old stepson obtain a relationship with my five month old daughter. I'm afraid of him hurting her or getting her sick. Everytime he tries to talk to her I get a feeling like a punch in the gut. I try to sit and convince myself I'm overreacting but when I do I just make myself even more depressed and end up making the situation worse. On his mothers side he has another half sister. He told her that he was going to kill her and her father. His half sister on his mother's side turned one in March. I'm afraid he will forget what age my daughter is and try to play rough with her. Or that he will be jealous and act out by hurting her.