Mountains and molehills come to mind...
Aliona is Russian, yes? I think we need to take a cultural perspective on this, as well as the fact that they are two adults working in a stressful situation. Russians swear as easily as they draw breath, and their mildest oath is one that would have Widdy doing a Gillian McKeith and fainting on the dance floor (incidentally, it's muck your futher, as Spooner would say). As another example, if you really wanted to upset Camilla Dallerup, I was told that the worst swear-word you can say to a Dane is something along the lines of 'may you get cancer'.
I personally think that particular VT was cobbled together to show that all is not sweetness and light in the Matt and Aliona camp, in an effort to dampen their public popularity. If he is at the top of the polls, as has been leaked, anything vaguely uncomplimentary to either contestant might help restore some balance. Who knows?