Apologies if anything in my OP was unclear.
Backstory with ex and DC1 is very complicated, but my belief is that ex isolated DC1 as a tactic to further hurt and control me.
DC1 came with me originally when I left but spent a lot of time with his dad as he got all of his one on one attention and time spent doing his hobbies that my ex never gave to our other two children.
Ex was never physically abusive to the children, though psychologically he damaged them significantly and I am still dealing with the fallout of that. Social services paid me a visit following an incident that was reported at DC1s school, but DC1 later denied the incident had happened. Social services told me not to pursue official custody as it would likely result in DC2 & DC3 being obligated to spend time with him.
I thought I was doing the right thing at the time, especially as DC1 was refusing to see us and ex was threatening to call the police and have me charged with harassment if I didn’t stop trying to contact DC1.
(I was terrified for years whilst with him, and have remained so, despite my best efforts to no longer let him affect me)
During the time they spent together, DC1 was fed a lot of untruths by ex and ex’s family and alienated him not just from me but his siblings also. Ex made very little effort to see his other two children, and has contributed nothing financially.
I communicate with DC1 when it safe for him to do so but it is difficult to rebuild.
I don’t talk to ex, I don’t tell him anything -financial or otherwise. DC2 has had some contact with his dad over the last couple of years and I think tells him bits of information in an effort to bond with him.
Ex thinks he knows it all and will tell whichever tale paints him in the best light possible.
I’ve had another chat with DC2 this evening. He thought I was very financially well off thanks to his dad’s lies, and had also been told that DC1s money from me was the £5k figure ex had plucked out of the sky. He now understands better and we have come to an agreement over the savings (which only he can access when he turns 18).
The car is in DC2s name. I couldn’t afford to buy him his own car when he passed his test and sold mine as I can manage without for now.
Think that’s covered everything…
Thanks all for your input.