lol i spot some retarded here...having a child with your own sibling can ruin the childs life...if ever the truth resurface the child will be bullied and stigmatized by the society...thats what the girl is implying...the one that will sufer is the child and not them so it will be really is bothering
whatever reason you have even if she has talents you cannot force anybody to do your bidding...if forcing someone is acceptable then you wont have criminal charge for it...