I think it's unresolved trauma from her childhood long held ones,
She is also from her Partners family getting her idea of idealised family would be like,
too,
I think you remind her far too much of unresolved issues from her childhood unfortunately,
And she sure wants to ensure has some distance from you cause of this,
I know you did very well, bringing her up at exceptional young age as you did,
Credit due,
But sounds as if materialistic stuff is something you see as a tokens of how much you thought of her and in a way, conditions attached to them,
Materlistic should be freely given not with expectations attached to them,
Materialistic stuff should not be used perceived as a levage to gain any emotional related expections to manipulative her into being what you expect her to be like,
Otherwise best not to do this,
She is her own person, even though you brought her up, and come from troubling as in (trauma same family unit, ect
I think we live in a materialistic society in which materialistic things are percieved as a substitute for affectionate
I think becoming a new mother is triggering old long held festering unresolved emotional wounds,
It's making her look/dwell at her traumatic troubling past and it's making her feel resentful that she had to endure this kind of hardship as expectations young age,
And also looking frankly frailties of life,
even her own mortality maybe,
What if history in some way repeated itself senerios in mind, ect
Essentially she is seeing with fresh eyes,
'What a Bastard life"really was to her, in that life dealt her unfair Shitty ✋️ hand, !