Zaid Alsalami, Shaykh Dr Zaid Alsalami is an Iraqi born scholar, raised in Australia. He obtained a BA from Al-Mustafa University, Qom, and an MA from the Islamic College in London. He also obtained a PhD from... Answered 2 years ago
Bismihi ta'ala
If she becomes Muslim, her marriage is automatically be nullified, should her husband not convert as well. She will need to observe 'iddah as well.
Of course, this is a serious decision that she needs to deeply think about, as leaving her husband might not be an easy thing to do.
And Allah knows best