Kathy (Jennifer Aniston Jennifer Aniston) is a single woman in her late forties who has a job, has friends, enjoys being single and has the idea of having a child to raise on her own. After contacting the relevant institutions, Kathy finds a suitable sperm donor, Mr. Ronald (Jeff Gobren Jeff Goldblum), who doesn't want her best friend Wally (Jason Bateman Jason Bateman) to change Ronald's semen angrily in the bathroom at the "pregnancy party" held for her by her friends. It turned out that Wally had always loved Kathy, but the two had been friends for too long and had lost the best opportunity to be together, so they watched Kathy leave him. When Casey came back to live in New York for seven years, she brought back the precocious seven-year-old Sebastian. Wally, who greeted their return, easily found that Sebastian was similar to himself. he wanted to tell Kathy the truth and confess his love. I don't want Ronald to reappear in Casey's life.