I'm having a hard time remembering who Luann critized for sleeping around? The only single woman for the first few seasons was Betthany and then Kelly B (who she was good friends with) and that bikini wax chick, followed by divorcees and widows Sonja, Dorinda, now Ramona and Carole. We know her issues with Carol and she mentioned Sonja's drinking but I don't think she ever accused any of these women of sleeping around like whores.
Oh, and after being yelled at, called a whore, adulterer, and a hypocrite, I would be pretty rattled too and it would be a bad time for me to listen to anyone else's problems, especially Jules who was clearly only there to get info so she could run back to her mean girl anorexic club.