Is she? I have to say she's not very open with this information I've been involved with NUS for a while now (couple of my predecessors were on the nec so it's a bit of a tradition up here!) and have become close to a few members of the nec since becoming a sabb and have never heard her talk about the labour party!
I assume what you meant was that
She's labour, but only in that OI kind of way that means you will never be seen with a party leaflet in your hand unless it is going to help further a flailing career in which case it means covering yourself in rosettes and proclaiming that 'I've done more canvassing than I've had hot dinners'.