Complex sentence: When she had asked him what he was doing, he'd patted her head and told her to "go back to sleep little one, your mom is fine", and according Marcy, this had happened just 15 minutes before her father got home.
Split into simpler sentences: When she had asked him what he was doing, he'd patted her head and told her to "go back to sleep little one, your mom is fine". According to Marcy, this had happened 15 minutes before her father got home.