From the spoilers I heard that she gave birth to a girl but dies after few hours of birth. Then her heart was translated to the boy whose parents died in a accident and our Mc adopted him.
My guess is that YL prob mistaken that Cutie Pie was a girl because of his feminine facial features as the chapter says he is often mistaken as a girl.
Yo from what I read just now....... the ML does not love her just lusts for her..... also it's a boy since the MOTHER herself had described the child as a HIM in one of the previous chapters
