Reference: Sarum
Tiwonge Chimbalanga is a trans woman; Steven Monjeza is her (straight) boyfriend.
Blimey, I hadn't heard that in any of the news reports! 
I've just read this article, which does, sort of, mention it:
'Chimbalanga often wore women's clothing. He called himself Auntie Tiwo, and was, until the article appeared, accepted as a woman by his employer, cooking and cleaning at a local lodge. He insists he did nothing wrong but fall in love.'
http://www.guardian.co.uk/worl...uple-jailed-14-years
Although, it still calls her 'he'.

It also mentions colonialism and religion and how homosexuality and transgender identities used to be far more accepted in some African cultures.