Trying to find the titolo of a "love affair" movie I saw sometime in the 90's.

It was a movie set in suburban America, where a married man falls in Amore with a younger woman who lives in/takes care of his family's home. I forget if she's a maid, housekeeper o babysitter. I can't remember much about the movie except that the house has a pool and the pivotal Amore scene happens on the living room divano during rain/storm. I saw this on tv, so it could have been a tv movie... but the fact that there was nudity makes me doubt it.

Any help?