In the second season, Monica falls for her father Jack's (Elliott Gould) friend, Richard Burke (Tom Selleck). Despite the twenty-one year age difference, Monica and Richard are happy, and her parents accept their relationship. However, as a result of Monica yearning for a family but Richard having already had one, they break up at the end of the second season. Monica then pursues a chain of various men until she unexpectedly begins a relationship with her longtime friend, Chandler Bing, at the end of the fourth season, during her brother Ross' wedding to Emily Waltham in London. Monica and Chandler try to hide their relationship from the rest of the group for much of the fifth season, but eventually everyone finds out. After celebrating their first anniversary in Las Vegas, they move in together and get engaged by the sixth-season finale. After their marriage, Monica and Chandler try to conceive children, only to discover that they are unable to do so. In the final season of the series, they adopt new-born twins, whom they name Erica and Jack.