I've got a few I use during "maintenance sex."

Her having sex with a friend while I watch

Her having sex with a stranger while I watch

Me pumping her after another guy has emptied his load into her

Her best friend watching us

Her best friend joining us

Me fucking a stranger as her husband watches

Fulfilled many other fantasies involving strangers but sadly never this, my hottest.

Used to turn her on by sharing various scenarios around it during sex, including one involving a bookshop manager she'd confessed to fancying whereby I would secretly get him on board with my plan, which was to let him in one night when she was in deep sleep and let him take my place beside her in bed.

The nearest I got was when she rejoined me leaking cum after shagging my best friend (whom she also fancied) in our spare bedroom. Needless to say I reclaimed her with possibly our hottest sex ever!

I have done this several times with several different women. I was single for over 40 years so I got to play out a lot of different fantasies with many different women. One woman told me her fantasy was to be blindfolded and to be taken advantage of. I planned for my best friend to come to my house and knock on the door at a very specific time without her knowledge. I got her into the bedroom, tied her up and blindfolded her. I timed it just right so that as soon as she was blindfolded there was a knock on the door. I left her tied and let him into the bedroom. I instructed him not to talk so she wouldn’t figure out who he was.

I did tell him to cough and clear his voice from time to time so she would know there was another person in the room. I continued to have sex with her but he didn’t do anything He just sat there and watched. He got to see her naked and got to see her tied and spread eagle so he got to see her pussy and tits. After giving her a massage and teasing her I eventually untied her and I let her get on top and fuck me. I never took her blindfold off. Before we both got to cum I gestured him out of the room. After she came hard I took off her blindfold. She didn’t ask who it was. She said, “I didn't necessarily want him to touch me but I was expecting him to.” She was happy with the experience.

Eventually after a few more sessions like that he eventually touched her and she blew him while fucking me. She eventually figured out who it was after the fourth time but it was fun for all while it lasted. I done this with several women and all of them eventually got sex from both of us. They all enjoyed the experience. It took time to do this with all the women but it was worth it.

A hot role play we do often. She’s wanted this one a lot, and I don’t need to suggest. I’ve told her one of these times it’s not going to be me, and I’m going to let another man fuck her while I watch. That turns her on crazy, to the point she will sometimes ask if it’s the new guy this time.

When I’m convinced that she really wants me to have another man fuck her (I actually think she does as long as she can pretend she doesn’t know) I will arrange it.

It’s not going to be a stranger. Someone she knows.

To be fair I’m usually thinking about anything other than sex to make sure I don’t finish before her :o

On the odd occasion when that’s not the case I usually imagine I’m fucking her best friend

I usually imagine I’m someone else (a friend or husband of a friend etc) and she has dropped her guard and he’s got her panties off. She can’t help but enjoy the immediate action but she’s going to regret it soon.

Thanks.

Yes, aware but locked out and could hear nothing. Found it impossible to hold off from relieving myself imagining what must be going on. They were at it for hours so fell asleep before she woke me in a state of euphoria at her triumph. I'd never known her so high. The realisation it was sex with my best friend that made her so ecstatic drove me crazy for her.

Wife and I do that a lot actually. I've had a friend of mine tell me she was thinking of me fucking her when she was fucking another man. That was especially hot to hear.