Arnaz and Ball's marriage was turbulent. Convinced that Arnaz was being unfaithful to her, and also because he came home drunk several times, Ball filed for divorce in September 1944, but returned to him before the decree became final. Arnaz and Ball subsequently had two children, actress (born 1951) and actor (born 1953).
Although both Arnaz and Ball married other spouses after their divorce in 1960, they remained friends, and grew closer in his final decade. " was never just a title", wrote Arnaz in the last years of his life. Family home video later aired on television showed Ball and Arnaz playing together with their grandson Simon shortly before Arnaz's death.
Arnaz and Ball decided that the show would maintain what Arnaz termed "basic good taste" and were therefore determined to avoid , as well as humor based on physical handicaps or mental disabilities. Arnaz recalled that the only exception consisted of making fun of Ricky Ricardo's accent; even these jokes worked only when Lucy, as his wife, did the mimicking. In his family, he remarked that all the husbands practiced adultery and did so when he was with Ball. It was one of the things that led to their inevitable divorce.
Arnaz pushed the network to allow them to show Lucille Ball while she was pregnant. According to Arnaz, the network told him, "You cannot show a pregnant woman on television." Arnaz consulted a priest, a , and a Protestant minister, all of whom told him that there would be nothing wrong with showing a pregnant Lucy or using the word 'pregnant'. The network finally relented and let Arnaz and Ball weave the pregnancy into the story line, but remained adamant about eschewing use of 'pregnant', so Arnaz substituted 'expecting', pronouncing it 'spectin' in his Cuban accent. Oddly, the official titles of two of the series' episodes employed the word 'pregnant': "Lucy Is ", employing the French word for pregnant, and "Pregnant Women Are Unpredictable", although the episode titles never appeared on the show itself.