OK, i get that maybe it was an unreasonable request.
To answer some points:
Yes i was the OW. However, both my ex and his have new partners, so not sure why there should be any issue about this now. It was a while ago, and really needs to be moved on from. Yes it was not nice, and no i am not proud of it, but its happened, we love each other and will be staying together.
Ex wont agree to swap weekends so that i can do the 2 weeks. DP cannot get to exs via public transport. Once his driving ban finishes he will obviously be able to go himself. His family all live miles away.
Yes he chose to have a DNA test true, but im not sure he really thought it would come back negative. He wanted to be able to show the child really was his. Everything else snowballed from there. No he does not pay maintenance for either child, but he used to buy clothes, presents for them etc and fund them when they were with him, and will continue to do so for both DC.
He now sees them via a contact centre because of all the hassle going on. Even now though 1 or both will not always stay. I believe this is because there is too long between visits.
Yes i am trying to help him push this. I barely have contact with my daughter and it is heartbreaking. She has systamatically been turned against me, I left her with my ex because i believed it was best for her. I dont want DP to end up without contact with his kids.
School was asked about the children having access to the email account via school, not necessarily keeping secret from mum, but the school helping them to access, read and reply. They have declined as it is a "domestic matter". Fair enough.
So what else can he suggest:
Emails which his ex can go through? Think this just allows her to make sure they do not reply. So how do we get round that?
Web cam - set times & set durations? How can this be made to work?
Other ideas?