Answer:
Codependency is at work in this situation.
Step-by-step explanation:
Codependency is a concept used in psychology and social work to understand and explain the dynamic of a family in which one member is a substance abuser or has another kind of addiction. According to this concept, while the family member becomes dependent of a substance, he or she also becomes dependent on the rest of the family and, likewise, the rest of the familly becomes dependent on him or her.
In the case stated in the question, although Pam is not happy with his son's addiction, she is enabling it by not making him accountable for his decisions and preventing him of experiencing the consequences of his actions. Besides depending on alcohol, his son has also become dependent of his mother in order to continue his addiction and she has become dependent on his actions for her wellbeing.