Trying to find this movie, I swear it was on all the time when Channel 5 in the UK started.
Vague details - Softcore, I believe the lady was the wife, she was constantly in scenes where it was like she was praying or worshiping.... something, and each time she did she became more sexually adventurous/sensual.
One scene she showed up to her (I think) husband's office, she had changed her hair colour and dressed more provocative, the husband is upset with her but they end up having sex