About dead mothers, as a trope:
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Missing Moms are almost always remembered in a positive light, unlike Disappeared Dads (although see First Father Wins). Expect the father to wax poetic about the times they shared, and to tell a female hero "You look so much like your mother." Death by Childbirth can be a cause of this. (By contrast, if the Missing Mom is alive and willingly abandoned her child, she will probably been portrayed as worse than an absentee dad note .) This beatification can also lead the way to a Wicked Stepmother if the father remarries, or a child's Tell Me About My Mother. If the mother is dead, the surviving spouse is almost obligated to have a Happier Home Movie about her, such as a wedding video or one with the hero as a baby."
This, connected to Missing Moms, like in 10th Kingdom...how the mother in question is often glamorized or romanticized by the remaining parent, for the sake of the children (or perhaps, for the sake of her memory? I don't know), so the children have this AMAZING memory of a mother they never knew, that is, until they find out that the mother in question is not dead, but rather willingly abandoned them.
I had a really weird dream last night that I was dead, and that my husband (this husband was a specific person in the dream...again, brain being stupid) was telling our children wonderful things about me.
"Your mother was so glamorous," he said. "Her hair and makeup were always perfect." And I kept thinking, no, that's not me at all. Before I died, I hardly ever wore makeup anymore, and I never bothered making sure my hair was even dry before I left the house.
Then I realized I wasn't dead. I was in an apartment in another state, watching a VHS tape someone anonymous had mailed me.