No previous issues that have led up to this current situation. 6 months ago he was just an emotionally immature 12 year old - only interested in playing playstation with his mates. He showed no interest in girls until overnight he suddenly had a girlfriend. He does tend to be quite obsessive/fanatical with a subject, right up until he loses interest, as is usual with autism. So he's got totally smitten with this girl and literally no one else in the world matters to him. It has surprised all of us how rapidly their relationship developed and how he's changed.
No real behavioural issues before, although has always had some difficulty accepting authority (from parents, teachers, scout leaders etc), that was always just put down to his autism, so he's got away with things that other kids would have been disciplined more strongly for. He's always walked all over his mother - in his eyes she's just there to be his servant. Her only failing is possibly to have been too tolerant of his attitude. He has a good family around him (despite separated parents), been doted on by his mother, no background or issues to have made him despise her (other than suspected manipulation by his g/f).
But now his relationship with his parents has broken down completely. They've tried everything to get him to talk to them about the pregnancy, but he's giving them the silent treatment and won't engage at all.
In some ways it really is as simple as at home his mum tells him what to do (tidy your room, feed your hamster etc), but at his g/f's house there is no one telling him what to do. G/F's mum is very lax with any parenting, and is rarely at home or sober. From what DS can gather she's openly encouraged their sexual relationship and was aware that they were trying for a baby.
DN had autism diagnosed officially about 5 years ago, but it was suspected from a young age. He's developed physically quite quickly, so appearance wise he looks 14/15, and to talk to he's quite self assured/confident. To the untrained eye you'd never know he is autistic. But when you get below the surface it becomes clear that he's rather emotionally immature.
I'm not sure family therapy is going to be possible any time soon, as DN simply won't engage with anything like that if his parent's are involved. Relationship with his g/f has caused him to totally alienate them - she seems to have convinced him that his parents are manipulating him. I think he needs some one on one therapy to try and get him to realise that he's a victim and his parents aren't the enemy.