NWT love tree dusty rose button up blouse bodysuit

NWT love tree dusty rose button up blouse bodysuit This is *so* cute but says it's a large and fits like a small. I loved it and bought it for myself, but it didn't fit me. I typically wear a medium and wanted it to fit loosely; it is way too tight to even button. Also has what looks to be a small stain on the front (assume it's from someone trying it on, I bought it this way). I haven't tried to clean it yet as I wanted to leave tag on. Smoke free home, more photos available upon request.