here's a passage I came across when reading about Hadhrat Ayesha (Radhiallahu-anha), and I feel that it relates to this thread.

Abu Huraira radiallahu-anhu had given the opinion that an illegitmate issue was the worst of the three viz. himself, his father and his mother. Ayesha Radhiallahu-anha said it was not true. the fact is that a person was a hypocrite and used to speak ill of the Prophet . Somebody said he was a *******. The Prophet said he was worse than his parents. This was a specific case and not a general proposition. Ayesha Radhiallahu-anha recited the verse, 'Nobody bears the burden of another.' The fault was of the parents and not the child.