I call you, my brother, one night and ask you to come over immediately. It sounds urgent, and you're not one to keep your sister waiting, so you rush to my house. When you get here I'm wearing only a silk robe and tell you that I need to ask you something before I lose the nerve to do it. You've been knowing for awhile now that I want to have a baby. However, all of the guys I have dated in the past weren't good enough to impregnate me. I want the most amazing, perfect baby and I didn't want their inferior genes being passed down to my offspring. I thought of doing artificial insemination, but I scrapped that idea as well. That's when I realized the solution has been in front of me this entire time. The solution is you! You are the greatest man I know. You are so smart, handsome, brave... you are everything that I want my offspring to be. And a man as superior as you needs to reproduce. Besides... it's not like we have never done something like this before. You remember that one time when we were on vacation with the family and we got lost in the woods and we ended up making love. It will be just like that time, except this time we will make sure that you get me pregnant. I want, more than anything, for you to impregnate me with your superior dna. And if I'm being honest, I've wanted you again ever since that time in the woods. I know we swore we wouldn't, because it's wrong for a brother and sister to have sex, but I can't help but dream about having sex with you again and having you fill me up with your cum. It's fate that we do this. Who cares if other people think this is wrong? You and I both know just how right it is and that's all that matters. You agree with me, don't you? You want this just as bad as I do. I can tell by how hard you are right now. Now, let's make love again. Remember my body as it is right now so you can really notice all the changes my body will make once I am pregnant. Won't I be so beautiful big and full with your offspring? Fill me up with your hard cock until your hot semen explodes into me, into my womb, impregnating me with our offspring as we cum together.