Serena says to Lily that she found out that Lola is not her cousin but her sister. Technically Lola is both Serena's sister and cousin since she came from a union between Serena's father and aunt.
Original International Air Dates:
Canada: April 23, 2012 on MuchMusic
Turkey: April 25, 2012 on CNBC-e
Norway: May 31, 2012 on FEM
Czech Republic: December 15, 2012 on Prima LOVE