Apparently this lane is a "refuge" not a "designated bike lane" - nonetheless it seems there is little route option. There are tramtracks to the right, and I think at that particular point it's not even possible to filter down the right on account of a platform. I think I would be very wary of filtering down there, but given that it seems it is the only viable route you can't blame her for taking it, and I'm in no place to judge her for doing it. It's clearly appalling infrastructure - some interesting points on this video where the cyclist speaks - in the very final interview you see several cyclists doing the same thing. I still find the reaction of the passengers appalling personally.