Meri Brown's worst year ever just got a whole lot more embarrassing!

The 'Sister Wives' star was humiliated when her online affair with a man — who turned out to be a woman — was revealed, but now an new report claims that woman is threatening to released 100 new voicemails and photos from their sordid romance.

Jackie Overton, who claimed to be a man named Sam Cooper, is making Meri's "nightmare worse," according to