Originally Posted by
PWMFlyer19
The rule is something like this. This is from aa.com, could not find explicitly on UA website:
Are you an adult traveling with a child under 15 years of age or another passenger who requires your care? NOTE: The passenger will not qualify, if these passenger types are seated anywhere on the aircraft.
So, you are technically ineligible whether you split the PNR, your child sits in a different row, etc, etc. You are in care of an under 15 year old.
Although, it does not list anything about a second family member taking care of the family..
OP, I'd see if you could find a bulkhead. If not, the option of sitting with the oldest kid, and then having the younger one with your wife might work..