I would think that you would also have to consider the states where you and your children live.
Different states treat wills differently.
Example:
Louisiana:
No matter if the father who lived in Louisiana chooses to move out of Louisiana, the offspring who were born in Louisiana get half of the father’s/wive’s assets, period. That leads to legal fights.
As others have said, get a lawyer.
Isn't that special.
Interesting; a Spaniard described to me how at the time of one parent’s death, half the assets went to the surviving spouse while the other half was divided amongst the children. That could cause some headaches/hardship...