Yes the GF started working at DS workplace around the time of the "kill your mum" message incident. I did hear that she was applying at other places so thought she was leaving but she is still there.
DS is still not working there but will be doing work experience this week in the field he is interested in and hopefully that will lead to an apprenticeship otherwise we will encourage him to keep his job.
He has stated to us many times that he doesn't want to be at school, he's a smart kid and doing advanced maths classes but he hates school. We are supportive of him leaving and ask if he hates it so much why is he still there but he won't answer (aka it's because of her).
We've had another reasonably good week.
He did sleepover at her Mums house last night. The Dad messaged us to let us know he is ok with it as he has been told and believes that while they are sleeping in the same bedroom, they have separate beds 🤦🏻♀️ I just can't with his naivety, but that's his issue I guess.
As for the future, we can't see this ending anytime soon. Some posters have suggested that he (or she) might meet someone else but they both don't go anywhere or do anything for that to even happen.
It's not like he sees his friends and she gets mad so he starts to realise it's not ok, as he just doesn't see anyone. When I'm feeling a certain way I can't see a way out of this for DS, he'll probably be with her forever as he doesn't and won't know any different.
And when I'm feeling another way, I sort of feel sorry for her.
I think part of all this is she was jealous of DS and my close relationship and that he has a larger family and she doesn't have any of that, so instead of integrating herself into our family and we certainly would have welcomed her (and did try) she went the opposite way and tried to make DS just like her, with no family and just them two.