I have the same fantasy @Calidor .
I brought it up with DP as part of an overall conversation about fantasies and things we'd like to try early-ish into our relationship 20 years ago.
She was very much in the "Nope, that's not happening" camp and so that was the last time I ever brought it up. There were also a few things she wanted to try that I wasn't into and so she hasn't brought them up again either.
In the intervening years, we have occasionally talked about it during sex, just as dirty talk, as a way of heightening things. But it's always been clear that its just a fantasy, not something real, and when we've done it it's something that she's started, she knows it's something that turns me on, and she's willing to indulge me on that limited basis.
That as far as I'm concerned is the only way this sort of thing can work. I have a kink. Mentioning it once to test the waters is fine. Continually going on about it in order to try and pressure your partner into going along with it very much is not.
If I couldn't live with that kink remaining a personal fantasy, then DP wouldn't be the woman for me, and I should end the relationship rather than try and pressure her into it.
OP, your husband is trying to force you into thinking about and doing something you don't want to do. That's not something a loving partner does. I'd be telling him that if he ever mentions it to you again, then you're leaving him. And I'd mean it.