I can't remember the name of this movie or the actors/actresses in it. I watched this movie a few years ago on either Starz or Encore. It's a somewhat dark movie. The main character is a young white female with dark hair. She lives in an apartment alone, I believe she is divorced or separated from her husband. I can't remember but for some reason she becomes curious or obsessed with her apartment neighbor. The apartment neighbor is also a white female, but much older and bigger. The main character, to get back at her neighbor, puts out a personal ad with her neighbors' address asking for men to come to her (neighbor) apartment for sex. The main character can hear the men come to her neighbors'. She was expecting the neighbor to get mad/upset, but the neighbor allows the men to come into her apartment and they are always coming. In one scene the main character goes to a bar during the day, sits at a booth alone and a man comes to her. They go back to her place and have sex and he leaves. I think the main character ends up going to her neighbors' apartment and someone ends up murdering someone else; I can't really remember the ending.

Those are all of the details that I can recall. I do remember after I had seen the movie I looked it up and the actresses on IMDB.com and the main character was/is a model. Any help would be appreciated!

Thank you!