I asked that my ExP introduce me to any new partner that would being coming into contact with my DS.
He thinks I should trust his judgement and he doesn't know how to tell a new partner they have to meet his ex. I think it's reasonable that if my son is saying over at his Dads then I ought to have some knowledge about someone who could potentially be spending a considerable about of time with him. Who is BU?
For context my DS is only 18 months old so obviously isn't aware of 'relationships' as such, but will be in the future and myself and ExP are currently on good terms