I received a text from her saying "hey I am in your area today with my sister and we are going to have brunch at this jazz place"
1. Was that her way of wanting me to ask her to come and see me?
2. Was actually on a 1st date with another man in my area from dating app?
Just thought it was odd that she never mentioned coming to see me
You aren't really good with social cues, are you? She told you that she was having brunch with her sister at a jazz place, and her telling you was a casual invite for you to show up if you wanted, no pressure.
If you had shown up, you might have had a good time and been able to meet her sister. Women generally don't want you to meet their family unless they are halfway serious about seeing you. Her texting you to tell you where she was at and who she was with was a casual invite to brunch.