MashaAllah even if her interest in Islam began with the brother, alhamdulillah she embraced Islam.
If she wasn't open to the idea she would have either gone away or insisted on him accepting her as ahl al-kitab, people of the Book. And her niyyah is between her and Allah.
It is something I find pretty annoying as a first generation Muslim - I am asked quite often about when I embraced Islam, if a guy was involved. And when I say no, they look shocked and continue to talk at me but not in English.
Then when I married a black brother, I was deflecting rude remarks about how I either took one away from the black sisters, or why I didn't marry an Arab. Older sisters look at one another, shake their heads and mutter that saying in Arabic which means "She couldn't do any better".
So I didn't care about the colour of the brother. I don't care about the ignorant attitudes from some of my sisters and brothers. I certainly do not feel those reprehensible feelings if I see a white brother with an African sister. So many double standards. Embracing Islam wasn't difficult - my family was supportive of my life choices and they remain so. The Canadian society where I live allows me to practice any religion and even has laws protecting me. I'm not so sure about some members of the Muslim community - but it's not my place to judge or generalize...my take on it is Allah tests us in different ways alhamdulillah.