Girl, it's time for you to lose it
Her mom became infertile after having her and her dad died when she was three. Her mom remarried when she was a teen to a younger man in his twenties. Her mom wishes she could have had another child... and so she asks her daughter a very intimate question. Would she be willing to conceive a child with her new step-dad, for her mother to raise as a second child? Her daughter says yes.