I find that the rug is really effective here. It has more colour than the couch and the wall wich makes it stand out and it has a wonderful pattern that goes well with the pattern on the dress, the couch and the wall. KEEP THE RUG! ;)
Wonderful composition and pose. The rug, her dress' print and the design of the stones behind her sort of compete with each other. I'd have her in a solid dress although I love it's nostalgic appeal. Maybe remove the rug?