I understand how a husband can suddenly not know what to say so he allows someone to go too far with his wife. It happened to me
Friends took us with them to a sauna this older guy had in his backyard. All five of us were nude and my wife (Karen) and her GF gave the husbands massages. Then the two naked women gave our host a massage. But then before I realized it, my nude wife was getting a massage from our host, the older guy. This had never happened before with my wife, so I didn’t know how to tactfully stop it, even though I knew he had his hands on my naked wife. Oddly, though this was my wife he was massaging/groping, I didn’t want to stare, but I glanced to my left and I saw him massaging my wife’s tits – including her nipples. Imagine seeing your naked wife having her breasts fondled by a guy the two of you just met while you and another couple watched her being felt-up. Her arms were at her side so her firm pert breasts and hard nipples were pointed straight up. My wife seemed to be enjoying the ‘massage’ or whatever he was doing to her. I didn’t like what I saw but I kept quiet. (In reality, I was getting pretty turned-on to what was happening to my wife.) As he caressed her breasts his fingers pinched her erect nipples. His hands seemed to be on her nipples a lot. When he glanced at me it was obvious our host enjoyed me seeing him fondling my wife. I was both embarrassed and simultaneously turned-on by the scene. I knew he was getting a kick out of showing me how 'helpless' I was while he took he pleasures with my wife. So I turned around to talk to the other couple which allowed me to enjoy looking at Bonnie, who was still nude and who has great breasts.
Karen seemed relaxed; her legs were not closed tight, so I wondered how good of a view our host had of her pussy as he massaged her feet. He got more than a delightful view. Later my wife admitted that a few time he slid his hand along the insides of her thighs and he didn’t stop! He cupped her mound, let his finger rest on her slit, and then slid it across the lips of her vagina. She didn’t want to make a scene or upset her friends so she didn’t say anything. He was now standing with his back to the rest of us so we couldn’t see what he was up to so he proceeded to slip in one then two fingers into her pussy. After our host was done groping/massaging my wife, she, Karen and her friend ran outside nude to cool off.
I'm sure the host must have enjoyed telling his buddies about his two nude women guests running around his backyard. Particularly the one he got to massage, fondle and finger while her husband was in the same room watching the show.