"What do they have in common... I found out today that MY husband of almost 9 years has been having an affair for 5 years with some slut in Chicago," the letter, which appeared in Page Six, reads.
"I am devastated!!!! And I have been duped!! Our boys don't deserve this!" She continued, referring to the couple's two-year-old twin boys, Jax Joseph and Jaid Thomas.
Beauvais, 43, married Nilon in 2001. She has another 18-year-old son, Oliver, from a previous marriage.