Usually it was ignited when Vance suggested some changes in dialogue or additional bits of stage business. Because the ideas were Vance's, Frawley refused to cooperate, often retreating to his dressing room. Not even the director could make him budge. Oppenheimer would have to go in and soothe his ruffled feathers. The producer usually got Frawley to cooperate by saying, ''Do it for me." Frawley would eventually agree, reminding Oppenheimer, ''I'll do it for you, but not for that bitch!"
After "Lucy" went off prime time, Frawley made this remark about Vance, his TV wife, his so-called "honeybunch": "She's one of the finest gals to come out of Kansas, but I often wish she'd go back there. I don't know where she is now and she doesn't know where I am, and that's exactly the way I like it."
http://articles.philly.com/1989-05-01/entertainment/26113544_1_jess-oppenheimer-arnaz-fred-and-ethel