Husband wants me to fulfill his wife sharing fantasy. What should I do?

[Anonymous]

my husband has been asking me about this for about 2 years now. I honestly feel really uncomfortable about it but I don't want to disappoint him. He wants to watch me have sex with another man. And I don't get why this is a fantasy of his. I think it's morally wrong even if he gave his okay. is this common? does he want an excuse to sleep with a woman so he is getting me to do this so he doesn't feel guilty? is he gay? does he need to have other men make him confident he got a hot wife but having them compliment me? help!

[Anonymous]

Tell'm to call me so we can talk about it. This sounds serious. Can I give you my number? You got any pictures?