This happens because she was always blamed even if she wasn’t at fault; as such, even when she hasn’t done anything wrong, she still apologizes.
For example, due to traumatic experiences like criticism in childhood or an unfaithful partner , She never believes that she is beautiful regardless of how many times her loved ones tell her.
these small fights make her break down ,toxic arguments that have been accumulating has broken and traumatized and thereby making her find solace through these breakdowns.
She requires lots of assurance in order to feel safe emotionally because emotional neglect has made her fear loss and therefore this is what she values most which was missing from the former spouse
She never asks for help and it is difficult for her to do so, since she was brought up being independent therefore having nobody to rely on at all will agree with this statement.