I've been watching that stuff in porn for years - it's my biggest kink. MFM threesomes, gangbangs, blowbangs especially. She knows I watch it and isn't bothered by it, but she doesn't know to what extent.
I've recently started watching hotwife videos and I've found myself imagining her in those kinds of scenarios - sharing her with other men. Starting with one or two other guys at first, gradually easing her into it until we end up in a situation where she's surrounded by 6 men, sucking them off, taking their loads on her face.
Sometimes when I'm fucking her, I even imagine there are a bunch of guys in the room with us, waiting their turn.
She's definitely no angel, she has a naughty side, but nothing like this. I almost want to bring it up, but I don't know if I could ever actually go through with it. Maybe it should just stay a fantasy?