Hi @Rhilee, so sorry to read what you are going through, it sounds incredibly complicated and very difficult to deal with, especially with people that are closest to you in life.
From the children’s perspective it must be hard for them as what they have known and been bought up with was taken from them. If they feel they need to take their anger out on, your new partner seems the ‘easy option’, especially as Mum has moved on and Dad hasn’t.
Of course this is made far more difficult if they’re not able to talk at all with you about it, let alone what is really happening for them. That’s also going to perhaps add to the ‘you and them’ part that is maybe making you feel lonely and isolated.
It was mentioned a little earlier in the convo about the childrens Dad, and that it is unlikely he is pulling strings so to speak behind the scenes. Just wondered if you know how he feels about your current relationship?
If Dad is still ‘licking his wounds’ over the break up, perhaps that is gaining sympathy from the children, and although strings are not being pulled, they are trying to defend Dad. Dad will also have his pride and not want you to see him as being vulnerable maybe.
And of course, if new man is out the picture, Mum and Dad may just realize it’s all a big mistake.
I think there are many many things that could be driving their reactions, it certainly isn’t just that he is a smoker. They haven’t spent time with new man, so it’s not personal towards him.
He is seen as a threat simply because he is not Dad, and he extinguishes any chance of their idea of a happy ending perhaps (mum and dad together again) especially as Mum left the marriage as it were.
Getting to the bottom of what is driving their reaction will not be easy at all, but maybe a conversation with the ex-husband might help to give the lie of the land. If he is supportive of your new relationship, then perhaps a united front as parents towards the children in terms of putting boundaries in place etc., will be a lot easier. If he is not supportive, then at least it might be another piece in the puzzle.
Not sure if any of the above helps at all, but please take care of yourself. Maybe talking through in a therapeutic (counselling) sense might help, someone completely outside the situation. Talking it all through properly will help take a little power out of it and may provide a little more clarity for you around it all. Time can be a powerful healer, talking openly with someone about all that is going on might take pressure off yourself a little and be kind to yourself.
Really hope things settle down and improve for you, apols for maybe overtyping on my response