From the report:
Before he had children, the FO's normally slept 8 hours per night. After having children, the FO normally slept approximately 6 to 7 hours per night, between 2300 and 0600, which could often be interrupted when the children required care. Often, the FO would take a nap early in the afternoon for an hour in an attempt to make up for lost sleep. The FO followed a normal sleep pattern during the 2 non–working days prior to the occurrence. The night before the occurrence, the FO was able to obtain nearly 8 hours of rest with some child care interruptions before waking at approximately 0600.
Soooo.....being an airline pilot AND having small kids at the same time is inevitably going to cause fatigue problems??? Well I agree entirely but what can we do?