What was this BL called?

Since our lists got nuked im trying to find this one. The BL was about a hero and villain dating, very fluffy and cute. I think the reason they were together was to keep the peace between their two opposing sides. They have a child together ( not omegaverse or mpreg) via magic and raise the child together. The villain had black hair, so did the baby. I think the baby kept calling the hero "hero" instead of dad/papa, too.