by LeoDavis
Donna obviously loves you and Erika definitely lusts you. You need to combine both of them in such a way that you can have families with both of them and as one gets pregnant the other begins wanting to have your baby too. Since Erika does not want to marry again, perhaps she can become a live-in girlfriend that occasionally shares your cock and takes in your sperm in a jointly non-legal polygamous affair. Something like modern day Mormons do when they are "married" in the temple, but are only friends on the street.