What the heck did it mean

Strange encounter:
What does it mean when a woman gets up from her table to look for a lighter and wonders over to a table where her friend left a lighter but she may or may not know it is her friends, she picks it up and lights then when just about to put it down she stops when notices me sat there and she scans me briefly before tightly gripping lighter in her hand then stops scanning and wondering off with it back to her table.Then she says **** off when he asked for it back and seems almost angry at me over nothing

Why are you asking for it back if it is her friends lighter?
If it's your lighter, why is left out for someone to pick up without asking you?

Strange, why grip lighter like that after scanning you right enough. Ask a psychologist I guess