Friends - [10x05] - The One Where Rachel's Sister Babysits
"The One Where Rachel's Sister Baby-Sits" is the fifth episode of the tenth season of Friends, which aired on October 30, 2003.
Monica and Chandler let Joey write a letter of recommendation for adoption, but they find out that he sent the letter in hand-written, luckily the adoption agency likes it due to the fact they believe a child wrote it.
Rachel's sister, Amy, visits again, and decides to stay with Joey and Rachel which proves to be a quite a pain. While babysitting Emma, Amy gets her ears pierced much to the anger of Ross and Rachel, however the two sisters make up.
Mike takes Phoebe to a game on their anniversary planning to propose, unfortunately she says how tacky proposing at a game really is ruining Mike's proposal. After realizing this she talks to her friends and decides she should propose to him in case he never does again, the couple go to another game and Phoebe proposes. However she embarrasses Mike when people boo and insult him. They go to a restaurant afterward, where Phoebe says that she doesn't mind how he does it, and states how cheesy it would be to hide the ring in a cake. Which Mike has done, he then gives up and proposes right there and Phoebe happily accepts.