It is impossible to reconcile her current actions with being a good mother. The sort of personality that makes a good mother could not be present in such a hateful person.
IIRC, Sheehan spent a very long period away from her family, so she was not integral to his development.
Though a two-parent family is optimal, there are many children who've grown to be fine men and women in a single parent home. Ditto for kids that have one good parent and one bag of crap.
There. Now you have three reasons that steve's comments weren't out of line.
Heck, Madalyn Murray O'Hair was a horrible person and and abusive mom, and one of her kids is a pastor.