Roger and Beck's future daughter, Genevieve "Ginny" Grimdark, aged 18. (Her default age is 16.) They also have a son who's a dog, Percival "Percy" Grimdark. They were both created by Roger extracting an egg from a donor, removing her DNA and replacing it with Beck's, fertilizing it with his sperm, and putting it back into the mother for incubation. This is supposedly possible in real life according to Wikipedia, but I wouldn't know much about that.