This sounds bonkers and I'm probably going to get ripped to shreds but here goes...
My sister is convinced her 3 yo DD is autistic, the problem is she's the only one that does. In reaction to numerous people pointing out that they don't see the child showing any autistic behavior's she almost seems to be encouraging the child to behave in a certain way...
There are so many examples but a few:
She attends nursery 5 days a week for 10 hours a day, she has asked them for a SEN assessment but they refused as they have said she isn't showing any neurodiverse behavior's and they have no concerns regarding her development, but said if there are any specific adaptions she would like they would look into it, she asked for a tent /den that the child can go into when she overwhelmed that the other children know they cant go into, they put this in place but pointed out 2 months later that the child never uses it.
She has taught the child to shout "space" and (fairly gently) push a person /child away if she feels they are too close to her, the problem is no-one has actually seen he child do this unless her mum prompts her, so for example we were at a park and sister was fretting as another child was playing to close to her, so she got her attention and did the movement prompting the child to shout "space" and push the other child away. They were both happily playing before that but understandably the other child moved away.
She hovers over her playing and told another child off for climbing up the slide her DD was trying to slide down as "DD is autistic and doesn't understand when other children don't do things the right way, it could upset her and cause a melt down"
She claims the child has fixations on certain foods, toys tv shows etc but no-one else see's these, theres a never a photo (we share loads of photos) and you don't hear the child talk about it.
She doesn't include the child in activities like trick or treating and seeing Santa as it will overstimulate her then rants on social media about her being left out? Other family members take the child for the day and she copes fine.
Sisters husband was getting so concerned that he mentioned it to our mum, his Dad (a retired school teacher) and friends and they all said they didn't believe the child was currently showing any autistic behavior's. She reacted very badly to this, said a mum knows her child best and that we are all denial, the child only shows autistic traits around her because she feels safe with her and is masking all other times.
Interestingly she isn't pursuing a diagnosis as she is claiming the nursery agree with her (they don't) and when the child starts school next year they can provide support without needing a diagnosis??