Should I hire my Clients girlfriend?

Ah the sun shines bright, the clouds swirl in the sky making funny faces at us on earth, the trees dance- or rather the sand dunes ride the breeze, and things of that nature are happening when suddenly THWACK! You are faced with this question. No, it's not that simple to answer it, because no matter how easy the question is; it always has its own little circumstances, tangled enough to complicate the situation in an entirely different way from before. But I exaggerate. The equation is simple. Great client. Done me huge favours. I am in the position of hiring his chic. She's ok, from what I gathered from our phone conversation, not spectacular, but ok. I can't figure out if I should. Would you?