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.