It was between A Chralaig and Mullach Fraoch Coire in snow and ice.
Short but fairly exposed. The route offers two problems, a traverse and a short scramble. The scramble could be belayed quite easily but you'd be struggling to put up a rope as a running guide along the traverse and any other safety would be of limited value other than psychological.
As others have suggested, your partner really needs to be working up to this sort of exposure. A basic climbing or scrambling course might give them a bit more technical confidence but only experience can help the vertigo and mental issue. A few years ago the same route in the same conditions wudae deen ma heed in too.
