Why does he female friend even care like that?

I have been dating this guy for about a month now. He told her not 2 call him or text him on Saturday because I would be over and didn’t wanna cause issues or have our time interrupted. She goes crying and complaining 2 her girlfriend about it which she ends up texting the guy I my dating about it. His female friend is mad and upset with him for telling her that thinking he is picking me over her. Does this sound right for someone who is just friends with that person?
Why does he female friend even care like that?
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