@anonymous21,
You do “foreplay” all week!
Touch her during the day, kiss her neck when shes at the sink; foot rubs when watching TV; bring flowers; have weekly date nights, whisper loving and then sexy comments in her ear, cook for her, text her with suggestive remarks, cuddle in bed without expecting sex, spend time seducing each other. Build up the entire “event” and when it does happen, it’s exciting.
Of course, she should be playful all week, too.