I know I wouldnt express concerns because I could see that turning into a- you dont trust me, you never will trust me, blah blah etc etc fight.
You could mention to her brother she is going to see gpa today but I wouldnt push him too much into going because it will be obvious that you just dont want her to go alone.
Try to let it go. It will be hard. It will suck. Having my WAH go out overnight to god knows where with who knows and ME HAVING NO IDEA. I JUST SMILE and say have fun. BYE! Hardest thing in the world but it is part of my 180s for myself. To be trusting until I have solid proof not to be.
