First point to make is we clearly aren't talking about vegetarians and vegans, as the discussion was about meat meals. I presume you're not advocating giving a vegan female guest a small portion of meat, so you don't get to bring that up to burnish your argument. We also aren't talking only about your family, so your presumably post-menopausal grandmother's iron needs aren't the point either.
And now to the links. Could you highlight the parts that mention women's greater need for iron please, as that's what we're talking about. And then tell us how you controlled for attitudes about who's more entitled to meat and protein.
Interestingly, the first one starts from the position that generally lower meat consumption would be beneficial, but doesn't address at all the fact that women suffer more because of low iron than men and that the most efficient ways to get this are through red meat. They talk of ethics around animal consumption, but don't mention the ethical issues around a claim that lower meat consumption in general is a positive, without considering women's specific nutritional needs. And you haven't managed to do that either. Half of teenage girls and a quarter of women 19-64 in the UK have low iron intakes!
https://www.bbc.co.uk/food/articles/am_I_iron_deficient
The second link is an article that talks about men feeling more entitled to these things. That's actually a big part of the point here, because none of us came up with our ideas about food or portions in a cultural vacuum. It also doesn't address iron deficiency levels in women.