Would you say it's a good sign if a girl doesn't want to talk to you about other guys she's talking to?

Met a girl few months ago, we were inching closer to date but didn't due to her ex coming back into the picture. He's since left the picture again, we did talk about it and said that we'll keep that door open though.

We kept as loose friends for the most part but occasionally flirting, she's been very quiet for the last few weeks but a mutual friend said it's just a ongoing situation hinting about a guy, we spoke briefly earlier asked if she's okay and she said "If only i could tell you but I can't"

Would you say it's a good sign if a girl doesn't want to talk to you about other guys she's talking to?
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