<P> Lily and Marshall are both ecstatic to have another couple to hang out with . They invite Robin and Barney for an evening together, which goes awry; Lily and Marshall become clingy and dependent, prompting Barney and Robin to "break up" with them . Eventually, Barney and Robin realize they miss Lily and Marshall, and they all profess their desire to be a foursome . When Barney and Robin's relationship starts to falter, Lily "coming out of retirement" to break them up . She executes an elaborate plan to get them into a big argument; this fails, but they finally realize they don't work as a couple . </P> <P> The group discovers that Lily has a doppelgänger named Jasmine, a Russian stripper . Lily is especially excited about this, and is so enthralled by her stripper twin that she and Marshall get a private dance . At the end of the night, Lily switches place with Jasmine and dances with much difficulty on stage, eventually falling into the crowd, to Marshall's horror . </P> <P> Throughout the sixth season, Marshall and Lily try to get pregnant . Their first attempts are unsuccessful, however, and they worry that they will not be able to conceive . In the season finale, Lily finally gets pregnant . At the end of the seventh season, she gives birth to a son, Marvin . </P> <P> In the eighth season, Lily takes a job as an art consultant to a millionaire called "The Captain", who eventually offers to move her to Italy . She turns the promotion down, however, as it conflicts with Marshall's job as an environmental lawyer . Marshall convinces her to take it, however, and the two prepare to move to Rome . In the season finale, Marshall accepts a judgeship without telling her, putting her plans in jeopardy . </P>

When do marshall and lily have a baby