None of them are meanies actually. It's just they were caught up in situations.
Maybe she did really expect him to come back, since she was all alone with those 2 kids. I am sure she didn't need her support, but maybe ...But again, she also didn't try to find out about her other two kids or how they are doing.
Actually, Pam is THE big Meanie
Nothing will resurrect Pam's character if shes the reason behind their separation. Yeah they r meanies to each other, for not trusting each other, where people like Pam ruined the best phase of their lives. Theor youth.