[MeanWestTexan]

"You have to have double blue parents, and a spouse with double blue parents, to get 100% blue-eyed kids, right?"

No, brown-eyed parents with brown-eyed grandparents can have 100% blue-eyed kids --- blue being recessive.

Note, this is POSSIBLE. Just not likely:

Bb + Bb =

BB
Bb
bB
bb

1/4 chance of blue eyes.

[LongElegantLegs]

What I meant was, you'd have to be second generation double-blue for this article to be accurate, right?
Otherwise, a kid with brown eyes could just be a recessive trait, not proof of infidelity?

[fortunecookie]

No, brown-eyed parents with brown-eyed grandparents can have 100% blue-eyed kids --- blue being recessive. Note, this is POSSIBLE. Just not likely:

My sister (gray eyes) and her hubby (blue) have 4 children, 3 blue-eyed, 1 green-eyed. Her inlaws are both brown-eyed.