"Your sister is sad because she's fallen in love with you, too" What better way to prove you love her than to also impregnate her? You must, however, reserve your heart for me. Let's go to her now, and I will again guide everything. Keep your eyes on Mommy at all times as your sister rides you and you suck and kiss my titties. But isn't it fun to hear Mommy degrade your sister as you fuck her? Sister must learn that even though she's fucking you right now you are and will forever be mine! Before long sister is begging to become pregnant, too, so I cheer you both on as you complete your task and spray your seed inside your sister's womb before I send her away. But you must have something left for Mommy, right? I know you've just spent your load, but it's always important to please me. Let's fuck again! Take me from behind, son, and let's cum together and creampie over and over. We have a beautiful future ahead of us!