On the most recent Gossip Girl (4/21/08)how did Jenny get her pals to forgive her for stealing a mom's dress?

Jenny had stolen a one of a kind Valentino dress and was trying to return it when she was discovered. Then the girl's mom in a later scene tried to make some lame excuse about maybe her mom donated it and forgot. How did Jenny manage to convince her pals to overlook the matter of the dress?