Same happened to me.
Would the cheater by any sort might've had the adress
mailto:rughani6@hotmail.com? 'cause she did the trick to me.
After I got onto her fast, she got scared and gave me amy account back and everything, without touching anything, EXCEPT my userinfo which had stuff I needed on there >_<
She went all "Sorry, sorry!" and I played with her mind saying it's ok, it's ok. Ment to report her but never got to it o_o Damnit >_< She actually hoped we would stay friends! >_O
EDIT: The secret chatroom in my case was, that she sent something to me, so I typed in my E-mail and Password(it was blank screens, so I still regret making that foolish decision or trying) and it sent my E-mail adress and the Password to our MSN convo. So she gained them and sent me my neopets PW. After I threatened to report her and get her accounts and stuffs frozen, while saying I don't care what happens to my account. I don't play alot anyways. After that she went soft, started sorrying and gave me my account back