[magellan]

"This ad was made by a perfectionist. The mother has black hair, but the children have blonde hair. The father has blonde hair. These are his children."

Actually, the mother's hair looks auburn. I don't think the ad makers were trying to suggest the mother is a stepmother, but who knows?

[Spktyr]

Enough women routinely dye their hair for fashion or vanity reasons that her hair color isn’t really relevant.

[sportutegrl]

I meant that the father wasn’t a stepfather. It is assumed that the children are the mother’s.

[thecodont]

I saw it as an original family unit. Very young children can have blonde hair and grow up to have a different hair color.