Mom becomes a submissive slut
The mother in this case is prim & proper in every sense of the word. She's religious, and maybe she's a school teacher.
Perhaps she's cleaning her son's room (or daughter if you want) and she discovers a business card of a Dominatrix.
She's blown away because she raised her son (or daughter) to be wholesome. She looks up the Dom and is even more blown away since there's bondage involved.
The mom goes to the Dom the next day with her checkbook, intending to pay her off to stop seeing her son (or daughter).
The Dom laughs at it off and says it's not about money, but ownership. The Dom agrees to never see the son (or daughter) again IF the mom takes his/her place instead.
Mom is torn, but she sacrifices herself for the sake of her child.
Over time the mom learns become submissive in the Dom's studio once a week.
The Dom realizes the mom secretly loves it, and wants to take it to the next level. The Dom 'programs' the mom the fuck her son/daughter.
There's two ways to go about that:
1. The mom is torn, but reluctantly agrees and does it. Then she's free of the dom.
2. The mom flat out refuses, so the dom blackmails her with camera footage.
Thoughts? Ideas? Takers?