Is it lawful for a wife who enters Islam to inform her husband?

(Part No. 19; Page No. 19)  Fatwa no. 7139 An Indonesian Christian woman who had come to Berlin, in West Germany, for a special task she is entrusted with by the government of Indonesia, converted to Islam. The woman belongs to an influential family which has good connections with President Suharto. Moreover, her husband is an official in the Indonesian Ministry of Defense and Security. In Sha'a Allah (If Allah wills), through her conversion to Islam, being an intellectual and influential woman, she will prove to be useful to Islam and Muslims. However, the dilemma is that Her husband is a Christian bigot and thus she cannot declare her conversion to Islam. Until now, no one knows about her conversion except us (7 people only). Nevertheless, she intends to tell her husband and children about her conversion to Islam in her own way so that she can call them to Islam. Your Eminence Shaykh, I do not know what to do in this regard knowing that Allah prohibited that a Muslim woman be married to a non-Muslim man and that such a woman has to leave her husband immediately after her conversion to Islam. On account of her being a new convert to Islam, I do not think she can enforce such an Islamic ruling and I fear that she may go back to disbelief. Furthermore, she does not belong to an ordinary family. Had she belonged to an ordinary family, leaving the husband would have been easy. Therefore, I ask you about the issue and want, if possible, a fatwa from Shaykh Ibn Baz. May I postpone ordering her to leave her non-Muslim husband until her belief gets stronger? Or, what should I tell her?