I would absolutely love my partner to be fucked by someone else, or even more than one at a time. I would love to see my partner suck lots of cocks while being fucked. I would love her to be covered in cum.
More than anything I would love her to have incredible orgasms lasting all night and for her to go into a special state of lasting ecstasy and then fuck her silly after the state of ecstasy for as long as I could manage and tell her how fantastic she is and how much I love her.