Imma be completely honest: I wouldn't say that Toriel doesn't have that coming at least slightly.

Not really.

Considering that all the weapons (i.e. the notebook, frying pan & empty gun, etc.) and armor (Manly bandana, dusty tutu, Cowboy hat, etc.) are all scattered throughout the underworld, it's likely that the kids all died before they even got to Asgore.

Tvtropes had a great theory on it in the UT WMG page.