Sex, lies and magic babies

Z: I can't believe that dad shagged Rebecca!
J: Really? you didn't know that they'd had sex?
Z: No. I always thought they did because she always used to sleep there but whenever I asked him he said that they didn't. Then he tells me at Christmas that she had an abortion. So how did that happen then was it some kind of magic baby?!!!
J: Oh I see so you didn't know that they'd had sex until he told you about the abortion?
Z: No
J: So which were you more shocked about then the fact that they had sex or the fact that she had an abortion?
Z: That they'd had sex
J: Why?
Z: Because dad lied to me about it when I asked him to tell me the truth