"Black was taken away by twenty members of the Magical Law Enforcement Squad and Pettigrew received the Order of Merlin, First Class, which I think was
some comfort to his poor mother."
-- Cornelius Fudge, Minister for Magic (PA10)
Peter Pettigrew’s mother believed he had been killed by Sirius Black, and received an Order of Merlin in his name along with his finger in a box (PA10).
There is no mention of what happened to Peter's father.