Wife's strange request to husband.

We (husband/wife) are new to this site and hope that the scenario isn't too bizarre to be discussed here. The last thing we want is to offend anyone. And if you don't mind we would like to address it third party.

It's not your run of the mill threesome fantasy so it will be a little descriptive. PLEASE BE WARNED! Here goes.

The man and wife are in their 50s and the wife would like to bring in a younger male (the younger the better as long as he is of legal age) to complete a fantasy she has been having.

She wants to lay on her back naked on the edge of a table with her legs up on the shoulders of the young male as he stands there naked facing her. She then wants her husband, remaining fully clothed, to somehow get the younger man aroused.

Then once the young man is erect, have the husband take one hand to spread the wife's vagina lips, using his other hand to guide the young male's penis until penetrating the wife. She wants her husband's face as close to "the action" as possible so she can vocally demand that he watch the young man's penis slide in and out.

Once the wife and younger man "gets off" she then wants her husband to clean both private areas up.

End of fantasy...

IS IT NORMAL for a couple to act out a fantasy such as this one?

Thank you.