ending is something like this prompt
"That's what Jacqueline realized that Tom had brought everyone down to the moral corruption, including Jacqueline herself, her best friend Claire, and even Jacqueline's stepmother Dana.
Little did Tom realize how Jacqueline had lost everything - the job she loved, the man she had dreamed on her life - but gained one thing that she never had before - a big black cock.
Jacqueline knew that Cash will continue to breed her, Claire, and even Dana into an utter BBC slut state.
Tom on the other hand got nothing despite losing everything."

write a story of betrayal, transformation, and hotwife making where a successful journalistJacqueline arrives home after a long mission only to find out her best friend Claire is being blackmailed by her enemies from Nigeria mission. 
In Chapter 1 - Jacqueline receives from Tom, her lovely husband, a video of Claire, as tearfully recorded by Claire's husband Ron - as she succumbs to the power of BBCs by NIgerian soldier. Jacqueline goes to find her but not till a large Queen of Spades tattoo is stamped on her ass. 
In Chapter  2 - Jacqueline traces the source of the Nigerian soldier, finding that Ron played a part of this scheme! When Jacqueline finds Nigerian soldier Evan, she too succumbs and receives her first BBC bareback. Jacqueline can't believe how good it feels despite the guilt she feels. 
In Chapter  3 - Evan, discovering the weakness Jacqueline has, blackmails Claire again to lure Jacqueline's stepmother Dana. Jacquline watches in agony and jealousy as Dana falls to the lust of BBC and even encounters a gangbang.
In Chapter 4 - Jacqueline finally captures Nigerian soldier and before she can ask him to explain why he did this, her husband Tom - who she thought and trusted - enters and slaps Jacqueline and lets Evan get away. Instead, Jacqueline is too overcome by another round of 4 BBCs and breeding for a full hot month.
In last Chapter 5 - Jacqueline discovers her new self, and with other two BBC sluts (Claire and Dana), finally face Tom and locks his pathetic cock in chastity belt. The story ends as discussed earlier with cums dripping out of each BBC slut.

write with full of dialogues specifying Claire: Jacqueline: Dana: in particular including moans. Try to balance out each Chapter with a lot of details describing emotions and tension