But we don't know that. I see what you're saying, but the mother could have just as easily been telling her daughter things like "only do this with someone you love". Like you said, we simply don't know.
As for the porn, you're right that I probably was thinking "I want to do that", but I was much older, knew actually knew all about sex, and had gone through puberty and actualyl had a libido, somethign the girl in all likelihood is missing.
Once again, I don't agree with the mom in how she was teachign the girl about sex, but like you said, children are very susceptible to suggestion, and if the mom did actualyl talk to her about sex and how it was special and only for married people to do it, then there is just as good of a chance that the girl won't grow up a total ****.
I also think some people here aren't giving children enough credit. Children are actualyl much better at handling mentally difficult situations than most people think. If she actually didn't like seeing the sex (which is a possibility) there is still an extremely good chance that it will not mentally scar her for life like some are thinking it would, which I hope is the case and the child turns out fine. In fact, a lot of what we consider mentally traumatizing events for children don't hurt them nearly as much as the aftermath when they see their friends and family have changed because of them.