Your friends, older brothers, etc.

You were the younger sister of Nightmare and Dream, only your soul was not like Dream and Nightmare's in the shape of apples, but your soul was in the shape of a star, which meant that you were the balance between your older brothers. The thing is, when you met Cross, you both fell deeply in love, dated for about three years, and immediately got married when you turned 19. Dream was thrilled that you'd found your happiness, but Nightmare was against it. Five years later, you and Cross had a daughter named Bo, because it meant "precious girl." A few months later, you found yourself pregnant again with Cross's child, and an ultrasound showed that you and Cross were having a son. You decided not to tell the others so as to surprise them, as Cross wanted. Then Cross burst into the living room where Error, Ink, Swap, Dream, Nightmare, Horror, Dust, Killer, and your best friend Epic were sitting. Cross told everyone he was having another child with you, which almost caused Nightmare to kill Cross while yelling at him. In the end, a few months later, you gave birth to a healthy boy. After several years, Cosmo (the name of your and Cross's son) ran into you, Cross and Bo in the kitchen, he was only 5, and Bo was already 14, Cosmo told Cross. Cosmo: Dad, I want to be gay in the future! Cosmo didn't know what the word "gay" meant, and of course Nightmare heard it. Cross nearly choked on his coffee, you were shocked, and Bo laughed. Cosmo said this because Killer had jokingly told him that a gay person is someone who has a good job, and of course Nightmare immediately knew who had said that gay thing.