Duchenne muscular dystrophy

So I'm a bit worry because I am 9 weeks pregnant and recently the doctor told me I have anemia. My other concern is my boyfriend and his sister have the same mom and dad. The sister has Duchenne muscular dystrophy she has every symptom of it and her legs and pelvic area is very very weak that she walks side to side, the dad is normal the mom is normal and my boyfriend is normal. No one on my boyfriend's side of the family have it or my side of the family have it. Is there a possibility my child can have that muscular dystrophy 😩????