Shannon had interaction with Gretchen on WWHL during s10, and Shannon was cold towards her b/c of what TamRat told her. I'm sure she'd continue to act the same way towards her. If I am not mistaken, they've exchanged words over Twitter b/c of Tamra. I know that her (Shannon) and Lizzie had a Twitter spat last year b/c Lizzie expressed her dislike for the women ganging up on Vicki and Kelly. Shannon popped up on her timeline (mind you, Lizzie did not tweet her) and told Lizzie to mind her business and that she wasn't on the show anymore. Sickening b/c it was Lizzie who backed Shannon in s9 and began to open everyone's eyes to Tamra's shenanigans, which vindicated Shannon. Goes to show that Shannon has loyalty to nobody and will blow with the wind.
This is why I wanted Lizzie/Gretchen back b/c I wanted them to eviscerate Shannon's lame a**, who'd willingly take bullets for Tamra. It would be then that ShanLoon would wake up and realize Trailer Sue is no one's friend.