It could be a disgruntled client. Maybe the female attorney didn't win a case for this client as they hoped, and in revenge, they dig up some dirt on her to blackmail her.
Well, perhaps in the story, a criminal organization decides to blackmail a female attorney. They threaten to expose some personal and embarrassing information about her family. She has to navigate through this difficult situation while still upholding the law. She might start her own investigation to find out who is behind the blackmail and how to stop them, all while trying to keep her clients informed without compromising the case.
The sitter is obviously one of the main characters. She could be a young woman trying to earn some extra money. Another main character could be the person doing the blackmailing. It might be one of the kids she is babysitting if they are old enough and mischievous enough to come up with such a plan.
One character could be a tech - savvy teen boy who uses his skills to dig up dirt on the girl. Maybe he hacks into her social media accounts and finds something he can use to blackmail her. The girl could be a kind - hearted but naive girl who is initially terrified by the blackmail. And then there could be an older sibling of the girl who has a bit of a tough exterior but is very protective of her sister and gets involved to stop the blackmail.
It could be an evil sorcerer. This sorcerer might be jealous of Sarah's unique power of control and wants to take it for himself. He could constantly send his minions to attack Sarah and try to disrupt her journey of self - discovery and power - mastering.
Perhaps it's a greedy merchant. He has seen Miss Baker receive a valuable gift or inheritance and wants a piece of it. So, he decides to blackmail her by threatening to spread false rumors about her family if she doesn't hand over some of her wealth.
Jealousy might be a motive. If the person feels that the mother - in - law is getting more attention or resources within the family, they could resort to blackmail to get what they think is their fair share or to simply spite her. Another reason could be revenge. Perhaps the mother - in - law has done something in the past that the person hasn't forgiven, and they see blackmail as a way to get back at her.
One possible plot could be that the sitter discovers a dark secret of the family she is sitting for. Maybe it's something illegal that the parents are involved in. Then someone in the family tries to blackmail the sitter to keep her quiet. For example, they threaten to spread false rumors about her if she reveals what she knows.
One consequence could be that the blackmailer is exposed. For example, if the neighbor being blackmailed finds evidence of the blackmail attempt and shows it to the rest of the community. The blackmailer then might be shunned or face legal action if the situation is serious enough. Another consequence could be that the blackmailer's plan backfires. Like in a story where the neighbor they are blackmailing turns the tables and uses the blackmailer's own secrets against them.
There could be a powerful demon from the underworld. This demon has heard about Sarah's power of control and believes that if he can take it from her, he can rule not only the fantasy world but also break through to the human world. So he sends his minions to harass Sarah and tries to find her weakness so that he can defeat her and steal her power.
Blackmailing is completely unethical. In the context of a 'blackmailing my mil fantasy story', it might seem like just a fictional plot device, but it represents a very negative behavior. It shows a lack of moral fiber in the character who engages in it. Moreover, it sets a bad example if readers were to think that such behavior could be acceptable in any way. Ethical behavior should always prevail, and blackmailing goes against all norms of good conduct.