Desi Arnaz Jr. is the son of Lucille Ball and Desi Arnaz. Desi Jr. called Patty out of the blue once and asked her to dinner. Thinking it was a business dinner, Patty went. However, Desi soon made his romantic intentions toward her clear. Patty asked Desi how old he was and was told he was nineteen. However, Lucille Ball told her he was only seventeen and accused her of knowing this because Desi Jr.'s birth was practically broadcast on national television via Lucy's show I Love Lucy. This relationship continued despite Lucy's threats against her son. However, during this relationship, Patty had an affair with John Astin and married a man named Michael Tell. It was widely believed that Desi Arnaz Jr. was the father of Patty's oldest son, Sean. However, Patty believed John Astin was Sean's father.