"Erika was absolutely furious with Teddi after she accused her of having amnesia in regards to comments she made about the huge blowout between Dorit Kemsley, Kyle Richards and Lisa Vanderpump at New York Fashion Week," a source claimed.
The source said Mellencamp did accept the apology, and the friends moved on. But when the episode aired last week, the feud combusted once again.
"When the show with the fight between them aired, it brought up all those feelings again, which resulted in Erika and Teddi lashing out at each other," the source said.
Mellencamp took to her Bravo blog to accuse Jayne of harboring "unnecessary anger," to which Jayne responded "pure comedy" on Twitter.
It seems there won't be much love lost over the fallout.
"They aren't friends outside of the show, and haven't really hung out since filming concluded," the source revealed.
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