I've 'noticed things' about her since she was around 18 months. She would have a piece of moon-mat and want my Mum to roll it up a certain way. If it wasn't exactly as she thought it would be she'd get really distressed. She'd have a dolly but she'd never play with it as a dolly. She would instead try and put a blanket on it so that it was perfectly straight and had square edges. Of course, dollies have lumps, so it never was. She'd rip it off in temper, then start again.
At preschool she had a meltdown so unstoppable that her teachers had to call me to collect her, but they decided it was copying behaviour because DD1 has SN. Her Preschool leader actually said 'I looked at DD2 and saw DD1'.
She really tries with other children, but she just doesn't have the skills to 'blend'. We went to fireworks evening and she called out to a (very nice) girl 'Hey, X, I'm wearing my hat and glove and scarf!'. The girl looked quite bemused and said 'I'm wearing mine, too...'. She walked up to a group of girls and said 'look at my lunch box', literally shoving it in their faces.
When she plays with children here, they gravitate towards DD3 and DD1. DD2 seems to get exhausted by social interaction, however much she seems to want it, and drifts off to do something on her own.
I have parents evening on Tuesday, with an appointment with the SENCO following. I wonder if I should show them that video?