His family comes with The Sims 2: Seasons expansion pack
Peter lives with his mother, Dora, his wife Samantha, and their three children, David, Sharla, and Tommy. His wife is pregnant with twins at the start of the game, but with a bug, Peter is apparently not the father. He apparently lives in Riverblossom Hills but each neighborhood has one in the family bin.
He lives with his parents, two siblings, and grandmother Dora Ottomas. His mother is pregnant at the start of the game with twins but because of a glitch Peter will not apparently be listed as the father. The Ottomas supposedly live in Riverblossom Hills but because they are in the family bin they appear in every neighborhood.