re: So my wife received a call from one of our child's classmates mother

This woman is crazy.

As a parent of two young daughters, I find the actions of this woman disturbing.

The only reason she's making these ridiculous assertions about your wife is because evidently, she feels that *gasp*, you told your child a well-delivered rendition of reality that a child of 7 years can understand, and presumably, she would rather tell her daughter some "stork" bullshite.

God forbid, this mother have to tell her daughter a semblance of truth.