What is the ruling on a woman spending the night outside her home during the waiting period (iddah) due to the death of her father?

A woman observing 'iddah (waiting period) due to her father's death must stay in her home. She is permitted to go out during the day and then return to sleep in her home. If she spends the night outside, she has violated the 'iddah, and she must repent and seek forgiveness.