Use your knowledge of the stages of development of attachment to explain her behavior. (simplypsychology.org)
I'm a 26 year old male, no wife, no girlfriend, no children but the whole development of attachment parenting is fascinating to me. (thehappiesthome.com)
For example, the exposure to unpredictable and uncontrollable stressors during sensitive periods of neural development can influence midbrain development and the functional development of attachment relationships, the prefrontal cortex and the functional development of executive function, and the hypothalamic pituitary axis and the regulation of stress responses (Castellanos and Tannock 2002; Boyce 2016). (link.springer.com)