Almost every woman on this thread has told the OP she would tell her own husband not to see this woman anymore.
Rubbish.
I'm on this thread and I said it sounded like she was a useful contact in his field and I was far from alone in saying it was fine.
IME it is very rare for men to be pressurised to drop genuine friends who women.
What is more common is for women (and often entire social groups) to freeze out the type of woman who doesn't know how to be friends with men without acting like a girlfriend they aren't shagging.
It's pretty hard to get rid of a real friend, because they won't be someone who only spends time with a man tête à tête, having deep and meaningfuls over dinner.
They won't refer to themselves as "just friends" or go on about how "nothing was going to happen", as if unless there is a penis in a vagina it's fine to otherwise act as a couple.
I have loads of male friends and I've never been ditched by any of them.
Maybe that's because I don't compete with their girlfriends for attention.
I can't be my attractiveness, because I have movie star good looks.
(Yes, Danny DeVito counts as a movie star!)
I've certainly seen some friends ditched who think it was because of a new girlfriend. In all cases the man was quite happy to say goodbye to someone who turned out to be a bit of a drag and a downer on group dynamics.
Not kind admittedly. But men can be terrible users. And are very good at getting women to take the blame for their choices.