[Néa] Now, now. Don't confuse me, I've spent the whole weekend trying to work out the correct number of 'e's and accent placement in the word fiancée...
As a French speaker, might I step in? As the word comes from French, I'm assuming that it follows French rules. Therefore Rab has a fiancée, whereas Rab himself is the fiancé, as French takes an extra 'e' to signify femininity. Of course, you might already know this, in which case my apologies. I'll keep my teaching to my job.