Honey, I have a big big favour to ask you. You know how me and your Daddy have been trying to get pregnant - well, you're old enough to know the truth. There's a reason why I'm not knocked up yet - I think your old man is firing blanks. See, you're not really his. There was a particularly attractive postman when we lived at the old house and well, the rest is history. The trouble is I don't have anyone I can call on for a quick fuck like old times and if I don't get pregnant soon then he is going to want to get tested. When they find out he is infertile then the tricky questions will start. I wish I didn't have to involve you in this honey but there's only one person who can knock me up and make sure the new little one looks like part of this family - and it's you. Will you help your Mommy? You've always been such a good mommy's boy to me, I know you'll help me this one last time.