It is believed Tom met the woman while working in Las Vegas, and Nicola has stated many times that the pair were having an affair.
READ: TOM WILLIAMS IN TWITTER SPAT WITH THE DREAMBOYS OVER NICOLA MCLEAN'S NIGHT OUT
Today Nicola took to Twitter to share a message from the 'other woman'. It said: "I'm a simple woman, I like handsome bearded brunette men."
Nicola captioned it: "When the girl your husband had an affair with posts this #thesegirls"
This is not the first time Nicola has exposed the woman. Last month she shared a snap on Instagram, showing the 'mistress' wearing one of her own jumpsuits.
READ: NICOLA MCLEAN TARGETED BY VILE TWITTER TROLLS: "DO YOU HATE YOUR CHILD"
Writing alongside the picture, Nicola said: "This is my jumpsuit you've been shagging my husband for months he has lied to both of us."
This morning Nicola's Twitter followers offered her some advice after she posted the insensitive message from the woman.
One user wrote: "she forgot to add 'and I like men who agree to ruin a marriage', while another simply stated: "she's nothing on you!"
Another wisely told Nicola: "Saturdays are way too precious to be letting her get into your head and wreck it! Wipe it off.. And march on! #girlarmy"
Former footballer Tom this week hit out at The Dreamboys in a fit of jealousy, following Nicola's night out with them on Tuesday.
Catch Nicola from next Friday as Closer Online's new weekly columnist!