It wasn't just that though. As reported in the Times (with sharetoken):
Judge Andrew Menary said: “One of the most egregious and vindictive aspects of this case is that you took the time to draft a lengthy and vitriolic message to their daughter. You sought to drag her into your unhappy existence which was shameful.”
Eleanor’s actions led the couple to disclose the woman’s affair for the first time. He said she had shown a “staggering” lack of remorse and and exhibited “vindictive, selfish and vengeful behaviour”.
Lucy Brown told the court: “In that message Eleanor Brown said: ‘I will make sure your mum is never allowed to forget what she did to my family and wherever she goes her photos will remain and follow her’.”
The judge said: “You conspired with your sister and mother to create the advert.” He also acknowledged that Sarah had sent Eleanor the sexual images, saying: “There is clear evidence she wanted you to use them in some way.”
Eleanor had originally denied two charges of disclosing private sexual imagery but changed her plea to guilty during her trial last month.
The judge gave her no credit for her guilty pleas because she indulged in the “ultimate act of brinkmanship” by forcing her victims to give evidence, something he said had “maximised their humiliation”.
He said: “You were arrested and interviewed and were utterly unapologetic. The lack of remorse you showed was staggering. Acting in the way you have is totally devoid of any moral compass whatsoever.”
https://www.thetimes.com/article/bc0b9e4c-98d1-49fb-b52e-e67823a35217?shareToken=4f4917667e46a61584093a4305bc18f8