Hi there,
You poor things, it sounds like life at home is really stressful right now!
You said in your post that the child has had a lot of people come and go in her life, and also you say that she is afraid her mother will love her less when the baby is born.
I agree with the other posts, a family counselor is not a bad idea. But, as you say, putting the child into a hospital/home should be a last resort. Try this first…
Let’s just suppose that the little girl feels that she has no control over her life. Things happen, and she has no control over them. To answer this, I suggest your fiancée makes her a special helper with the pregnancy.
1. The little girl and her mom (and not you!) go shopping for the new baby
2. Your fiancée consults with the little girl about names for the baby
3. Mum gives the little girl the job of rubbing oil on her belly every night, or every second night, when you are not there (so they can talk and so on)
4. Bring the little girl to hospital appointments because she is such a big girl (and not the other children)
5. You both try to include the little girl in decisions abut the baby and what will happen when he/she is born
The aim of all this to give little girl some say in what is going on in her life, that is, give her power back, and help her realise how important she is.You haven’t been there that long. She has been there longer.
You seem like a caring man, best of luck!