It's not your place to judge. You have to let her be her. Focus on what you can control and that's you. And if the clothes are nice, enjoy the view and compliment her on her choices.
Me: 31, W: 29 T: 4 M: 2 Kids: 3 (SS: 7, SD: 4, D: 3) Separated, still living together: Nov 2013 Separate bedrooms: Feb 2014 W working away; kids with me: Nov 2014