My daughter has done the "two house" thing for a long time. She was two when her dad and I divorced.

One night he called me, very upset. Helen was probably 3-4 years old at the time. He said that their cat, "Pookie" had scratched Helen and right as it happened, Helen said "that little *itch". He demanded to know where she had learned that word!!! She had NEVER heard it from me, for sure. We later learned that a bad little girl at school said it sometime and that's where she learned it!!!!