If enough mud is thrown some is bound to stick and it is sticking already.
Look at our own thread title - Nigella drug use, not Nigella alleged drug use"? Yesterday's 1 o clock news - "....heard how Nigella Lawson was a daily cocaine and prescription drug user" not "allegations that etc etc"
This has become a very dirty game and Nigella risks losing a very profitable US TV cooking show, a lot of support in the UK, I wouldn't mind betting the BBC will pull out of her next series and her career is in imminent danger of heading down the pan. There are already internet jokes about icing sugar, ham cooked in coke, weighing out flour and even on GN about "night time munchies".
Maybe this was the "deal" over the divorce, maybe the nose tweaking was a reference to cocaine use, maybe he is just getting his own back big time - game, set and match.
Whatever, the damage is done unless she can totally clear her name and the fact that even we (not just thegutter press) are talking about it 2 days on, says to me that even then it would be hard to recover.