Brother and sister who were born to teen parents. Their dad leaves, and their mom can't handle it and lets grandparents/aunts/uncles raise her kids. Brother who grows up hating their dad and worrying about his baby sister turning out like their mom, watching carefully and guiding her, sheltering her, trying to keep her safe. Gets her to young adulthood but never loses that paranoia, except somewhere along the way developing a pregnancy fetish targeted specifically at her where he fantasizes about impregnating her himself because HE would be a GOOD daddy and never leave her, so it'd be okay, actually safer than her not being pregnant bc if she's carrying HIS kid then she can't be carrying the kid of some other deadbeat who will break her heart and spirit, right??? He's basically already her daddy and he's made sure to keep her so safe and perfect and sheltered and so she'd be a GOOD mom, not like their own at all, so really, isn't that sort of perfect???
