It was soon revealed that Phoebe and Ursula were estranged twin sisters. The character of Ursula made a number of appearances on Friends. At one point she was dating Phoebe's friend Joey. Phoebe was concerned for Joey knowing that Ursula was a flake and would break his heart. And she did. Ursula stopped seeing Joey without even telling him she was dumping him. Phoebe stepped in pretending to be Ursula and broke up with Joey properly even giving him a goodbye kiss. Joey quickly realized it was Phoebe and was touched by her trying to do such a sweet thing.