I recently got this one idea in my head so here it goes.
There's a couple who has been married for about 3 years, the husband (me) has always been very abusive to his wife, raping her when she didn't wish it, hitting her, etc. She was trapped in a loveless marriage, but more importantly, wanted to get back at him. Over time, his wife had been plotting against him, to get the revenge she wanted. One day putting her plan into action, tieing him up, and torturing him to get back at him for all the abuse he gave her. This is the rough sketch of it, so if you like the overall idea, just give me a PM, or reach me at my MSN or AIM under my profile.