Ok, so my wife went on a business trip with her boss . . .?

she was going to a CAD conference in Reno, Nevada. She said that her supervisor was going too, because he needed to brush up on some of the software as well. Annnyway, she was supposed to be home today, but she called from Lake Tahoe and said that she decided to spend the weekend there. I asked her if her supervisor was going too, and she said "no". I do trust her (mostly), but I feel a little uncertain. Do you think I would be a untrusting person if I looked into this?