No. It was initially planned that Val's affair would be revealed. But right at the beginning of the game, many players complained and didn't want Valerie to have an affair.
Congrats on finishing the game Dev!
Always nice to see a completed project.
Does it have animations? What about music and sound? Can we name relations, or does it need a patch for family fun times?
Indeed, it isn't. But i had to finish the game at some point and Diane is not important enough.
But maybe there will be an addon or something else about this issue once.