If you really want her assistance, don't mention 'Birthday'.
By that, I was not implying that you should attempt to fool her but only that, she probably had no hesitation in helping you until you mentioned the word Birthday.
Many JWs are nice people with the best intentions. Most posters on this forum are not against JWs as individuals, as the majority of us were JWs for some time of our lives and many continue to have family who are JWs. We are mainly against the Watch Tower organization and its rules, policies and mind control it places on and demands of its members. JWs are misguided and blindly follow the organization, no matter what is demanded, whether reasonable or not. This is mainly why this religion is considered a cult.
JWs maintain they are not a cult as WT has presented an altered definition of what a cult is to its members, just as various scriptures have been altered in their bible to support WT interpretations.
As an ex Moonie, Steven Hassan has become an expert on cults and how they operate. He has written various books such as "Combatting Cult Mind Control" which I suggest you read before defending the JW religion.