Well, twins stories are more or less similar. There is special binding between them. Maybe because they are more connected. I was scrolling through my news feed. I remember reading a story. It was quite similar to this one. There were twins. One of them was gay. Who got married recently. He wanted to have a baby. With his genes. So his partner used his sperm. The twin sister of that gay guy offered her womb. This way she thought that her brother will feel connected to the baby. This was the sweetest surrogacy story I ever read.