Once a cheat always a cheat? What's everyone's opinion

This morning my wife opened a package she received in the mail and put on a sexy lingerie set and put her clothes on over it. She then got a sexy Pink Back pack and put something in it. Mind you my wife has not spoken to me or slept with me in well over a month. I then dropped the kids off at school and her at work. Do you think she is cheating? A few months ago she asked me if she could sleep with other men!