Hi, I'm looking for a story I read about a husband whose wife attempts to seduce him into swinging/swapping. She has two or three girlfriends that she has been getting close to, having sex with them and their spouses and seeks to bring her husband onboard. At the instigation of the other women, they set up a situation where the girls pretend to want all three/four husbands to agree to be tied to chairs. However he is the only one who is truly restrained and as the orgy commences he watches his wife and all two/three other husbands join the girls in their debauchery. However he is not aroused but disgusted and mentally leaves the situation, appearing to collapse and being unresponsive to the women's attempts to arouse him.