C.O.
it's called Munchausen By Proxy...
It's a disease - the parent or whoever the person is - daughter, son, etc. gets attention and sympathy from people when their loved one is PRESUMED sick..
If there are bruises or you see mom doing something to make the child sick - there are people that do that - there was a W. in Florida -
http://articles.cnn.com/1999-10-07/us/9910_07_munchausen....
that was actually convicted of it and lost her child/ren...
it's a hard thing to do - but really? you need to step up and intervene...it might make you out to be the bad guy but the health and welfare of the children are at stake...I don't envy you your position...