My wife told me she'd love to see me suck her BF to orgasm more than once.
My wife told me too, often.
When, for the first time, a guy pushed his cock into my mouth unexpectedly, my wife started to jerk him. But he asked her to stop because, as he said, he wanted to cum when he was fucking her.
She wanted to see us fuck, too, but that part (him fucking me) never happened.
It was me who asked my wife. The first time, when I asked her if she would enjoy it, she answered, "I don't know".
A few weeks later, she had apparently changed her mind.
She said, "Well, I wouldn't have refused my lover if he wanted to have anal sex with me just the once. You know what happens to me; I want it to happen to you too. The more I think about it, the more I'd like to watch another man fuck you. But he must have a huge cock. I want to watch you experience the pain it causes for the first time.'
After that, she started training my ass with her fingers, unprompted. First one, then two, and so on until she could fit five fingers in it (not a whole hand).
Then she said, 'I think you can take the largest cock anally. I'll be in charge. I'll put it in your hole while kissing and caressing my lover, encouraging him to fuck you deep and hard. To be fully bi, it's you and me. I've often fantasised about it."
But like you, it never happened.