Dabi was clear when he said he didn't want commitment. That's why you never expected him to stay after you had his baby—surprisingly, he did.

"Don't pinch them, you little rat." The villain was laying with the baby on his chest, his little fingers picking at Dabi's stitches. Despite his tone being harsh, he didn't stop the little boy from doing it.

Paternity wasn't meant for a villain like him. But he was there for you and your baby, nonetheless.