In other cases, marriage isn’t important, sperm is. There are women from 1st world countries who simply want an exotic looking baby.
They find a guy, not bad looking, who seems to have good genes.
They get pregnant unknown to him, and go back to their 1st World Country to the baby.
Focused on their job or whatever, they will hire someone to look after the child, and live their lives, having ticked the box marked; ‘Child’.
It is not that they ‘love’ children, or even want them, they just feel that they should have a child who they can depend on when they get old.