The most hateful joke - beware

So a guy’s wife goes into hospital for a minor operation. She goes into the operating theatre, and after about six hours the surgeon comes out to speak to the husband.
‘How did it go?’ says the husband.
‘Well,’ says the surgeon, ‘the operation was a success, but it seems to have had one or two unintended side effects.’
‘Such as?’ says the husband.
‘Well, for a start, she’s lost the use of her legs,’ the surgeon says. ‘For some reason she’s become totally paralysed below the waist, so she’ll need taking care of from now on, and she’ll be in a wheelchair for the foreseeable future.’
The husband is visibly shocked, but quickly rallies.
‘I’m sure,’ he says, wiping his brow, ‘that we’ll find some way to overcome this terr-’
‘Now just hang on a second,’ says the surgeon, ‘I’m not finished.’
‘There’s something else?’ says the husband.
‘Indeed there is. We don’t quite know why this is happening, or where the error was made, but the operation has robbed her of all bowel control, so she’s basically shitting herself all the time, she’ll need a colostomy bag, constant round-the-clock care. You’ll have to clean up the shit. The smell isn’t great.’
The husband now starts to look very distressed. But again he remembers his wedding vows, the promise to love for better or worse, and…
The surgeon politely coughs and says that there is just one more thing.
‘I have nothing to fear,’ says the husband; ‘how could it possibly make things any worse?’
‘Well,’ says the surgeon, ‘and again – we don’t understand it – she seems to have developed a constant, mustardy discharge for her vagina that gives off a very pungent smell – quite terrible – it’s just flowing out of there like the Nile. As a professional I’d say sex was quite out of the question from now on.’
The husband slumps onto the floor, broken.
The surgeon chuckles to himself and says, ‘listen, listen; I’m sorry. You don’t need to worry. I was just fucking with you. Everything’s fine. She died.’