Co-Host capability with Basic Level of Zoom

How can I be a Co-Host (I have Basic Zoom) on a webinar that another authorized user (she is Pro level) set up?

She established meeting links for monthly webinars. And she said she wasn't able to make me a Co-Host...?

Can this be set up from her end?  Or do I have to upgrade to Pro from Basic to be able to be a Co-Host on her link? 

Thanks!

Robin