The feud between Leann Rimes and her fiance Eddie Cibrian's former wife has hit a new high after the spurned ex lashed out at the country star for making plans to sing at her son's school.
Brandi Glanville was appalled to learn that Rimes had signed up to perform for her seven-year-old son Mason's classmates, and she took to Twitter.com to let her feelings be known.
Glanville writes, "I told (ex) Eddie (Cibrian) to please tell you that I think it is highly inappropriate for you to sing in my son's class on Friday. Boundaries!!!
"It's Mason's week (to) share his family with the class. It isn't your place. Let Eddie read a script."
Glanville and Rimes have been locked in a war of words ever since the country star's 2009 affair with the actor helped end the pair's marriages.