First off, glad you got out and saw it as the therapy needed.
Brother, I'm gonna be honest with you and straight to the point yet again (I too was out til the wee hours of the morning). I can't tell you enough how I was and regretably still am in your shoes. Don't come on here after all you post and shovel me crap that you're not investing way too much thought in anything your W is saying or doing. Puhleeeeze, you know and I know that you are.
That said, I don't know how the legal system is 'across the pond', but, here, there really isn't a dang thing you can do about your D's exposure to other OM unless it's an imeditate threat, be emotionally or physically.
Now, I'm a bit confused here. Why the hell should your W have any control over a "step child" on you? That's YOUR kid. In a reverse oposite, my XW used the fact that our oldest is hers and adopted by me in court over custody. But, since he was abused to near death by her first H that landed him a 10 year visit in the clanker, his name was stircken from the record and guess who Dad is? So I don't understand where your W gets off calling the shots there.
You're concerned about OM being exposed to your D? Man up, yet again. The only word of wisdom I think I EVER conveyed to my XW was: "If you're going to be with him, fine, not around the kids". Well, since she up and left and moved directly in with him, that 'request' went straight down the lou. But, now she sees the err of her ways and knows where she went wrong.
Where I'm going with this, I don't know, I'm tired and a bit hung over. I think my point is, YOU need to stop laying down and let the masses control the situation. That is YOUR daughter, not your W's. As I told my XW and her attorney in a court of law, I'll be dipped in sh!t if ANYONE thinks they will interfere with my realtion to BOTH my boys.
So, pull those belts tight and get ready for the ride. It seems you are fighting the power now of 2 women here. And why they'd gather in numbers against you like this is a bit questionalbe. Thus, are you SURE there isn't something you aren't telling us? I think there is a major piece of the puzzle missing here.
Me 35/XW 33 S13 & S12 M: 10/17/98 OM & S: 07/08 D final 06/09/09 12/03/09 - 06/13/10 "Piercing" 06/13/10: Engaged to Re-marry 10/17/10 06/25/10: Expecting baby #3 2/14/11