Complex sentence: The judge challenges Valentine to go tell the neighbour and she goes to do so but at the neighbours'house, she sees the man's young daughter on the telephone extension, listening to the same conversation and is horrified.
Split into simpler sentences: The judge challenges Valentine to go tell the neighbours and she goes to do so. At the neighbours'house, where she sees the man's young daughter on the telephone extension, listening to the same conversation and is horrified.