Women and the art known as the death stare

I had asked a question on Quora recently about this. I am not dating the lady in question but she seemed to give a quite intent stare when she saw her friend and I hugging before shouting over to her pal (across the gym floor)that she would see her the next day, with a thumbs up gesture accompanying those words. I did ask her out before but she was seeing someone at the time I asked. One of the contributors on Quora said it's possessiveness and cautioned against getting involved. What is your sense of it guys/girls after reading what I wrote??

 

sounds like she thinks you just gave her friend the rona.

 

I don't think I gave her the coronavirus...well I would hope not!

 

Maybe THEY are dating.

 

I think that is unlikely! I just found her doing that a bit strange particularly given that I saw her talking to another guy that same afternoon and she was really friendly towards him. Now she is a very bubbly and sociable person anyway but this seemed more than usual.