What is this movie called?

Well i am trying to search for a movie that i saw years ago with my boyfriend. i remember every scene but i don't know what it is called and i want a movie that will turn me on but i dont want it to be all about . this movie is the perfect one i need but i dont know the name! it was about a women cheating on her husband. she would have with her boyfriend everywhere. for example in the library, retuarants bathroom, etc. at the end someone takes pictures of her with her new boyfriend and her husband finds out. then she burns teh pictures in the chimney. What is it called... help me pleasee!