Hi @grethaventer, found your post via @simplylizelle.
Wishing you well with the fostering, not an easy task as I know exactly what you mean about having the disfunctional parents in the background as we fostered 2 children years ago, a long long story.
Can I suggest you try using the tag familyprotection and take a peek at @canadian-coconut's posts, sure you will find it interesting.
Take care :)