finally my husband tells me he has arranged for another man to come over tonight and have sex with me. I'm scared out of my mind and upset also. We begin to argue about it but he begs me to just do it for him telling me I deserve the experience also.

She makes it clear that she argued it, that she did not want to do it and he continued to pressure her with it. Sounds pretty emotionally manipulative and abusive to me. The husband was more than wrong in this situation, He blatantly violated his wife's trust by organizing a situation that she had no idea he was going to go through with, he KNEW she didn't want to do it and he kept pestering her until she said "Okay fine", She was visibly uncomfortable and he did NOT try to stop the situation. He essentially set her up to be raped by another man while he sat by and watched.

It's not about "I won't make a fuss about it because he likes it" Reading this, it almost seems like she was unable to stop the situation because she was traumatized by what was happening to her.