<P> Although Ivy has developed feelings for Nate , Diana has threatened her to stay away from him . This changes , however , when she finds out that Ivy 's ex-boyfriend , Max , is in town looking for her and sets up an elaborate plot that very nearly causes her secret to be revealed . Max finds Gossip Girl 's website , along with a picture of Ivy under ' Charlie Rhodes ' . He tracks Ivy down at the Van der Woodsen loft and Ivy is backed into a corner where she tells Lily and Max that her mother made her change her name to Ivy in order to avoid being used for her money . While discussing this later , Ivy offers Max money to leave town and start his restaurant in Portland , Oregon . When he finds out that Ivy is actually impersonating Charlie Rhodes , he blackmails Ivy into giving him more money than she had originally offered before deciding to stay in town . When Carol and CeCe return to town however , Carol tries to help Ivy out of her trouble with Max by getting CeCe to unlock the rest of Charlie 's trust fund , which she does . After Ivy convinces Serena to drop her date with Max on Carol 's advice , Max shows up to the party and attempts to out Charlie as Ivy to the rest of the Rhodes / Van der Woodsen family . It is Carol , however , that convinces the family that Max is lying , later telling Ivy that if the family found out what has happened to the real Charlie Rhodes , Ivy would n't be the only one out . Carol tells Ivy that she may now leave New York and start a new life with the wealth she now possesses . Ivy , however , tells her that she does n't care about the wealth and luxury of being a part of the family , and that Carol can have the trust fund , since all she really wants is a family to call her own . </P>
when do the van der woodsen 's find out about ivy
Ivy is actually impersonating Charlie Rhodes