My partner of 2yrs has a 4yr old daughter with his previous partner. Ever since I met her I have had concerns about her, she seemed very different to my 2 children, their friends and any other child I have ever really known well enough to pick up on their characteristics. The first thing I noticed was that she had a wonky eye (one eye would focus on you, the other would look outwards). But this was put down to being congenital. But other than that, she walks in a unique way; for example, she almost gallops clumsily, arms floppy, legs never straight. When she is stationary she never stands up straight, always has her always at a right angle. Her speech seems impaired, she doesn't appear to have full control of her tongue. Pronounces 'cuddle' as 'tuddle' and 'yes' as 'eh' and her conversations are very difficult to interpret. She seems bright enough though, you can tell she can understand things quite well. She struggles to dress herself, finds buckles and buttons too complicated. She is always falling over, and when she does she takes days to heal; all she did the other day was graze her knee and it looks like she fell off a cliff- it's still weeping! I know her mum had difficulties in childbirth and that she was born with forceps and from what my partner has said her head was very misshapen and her face was black and blue. When I wash her hair she still has a very pronounced bulge on the right side of the back of her skull. Now I could raise my concerns until I am blue in the face but I fear that her mother knows there is something wrong but she is too ashamed to do anything about it. My partner has raised concerns with her and she has responded with "I took her to the doctor's, nothing is wrong" but she is registered as bipolar and on anti-psychotics herself and is known for lying and bending the truth. I have a friend who has a rare form of cerebral palsy but his symptoms are similar to hers (although more severe). As I have no custodial rights and my partner doesn't see that there is anything wrong, what can I do? I am already concerned about her welfare as it because of her mother's mental state but I don't want to intervene. But I worry that if I don't intervene there could be something seriously wrong. Please help.