3somes plus some other?

My partner and I have previously discussed have threesomes and both of us are willing to give it a go, but I’m also incredibly nervous because I haven’t done it before. In previous discussions, we have agreed that because it would not be common practice, it would be worth getting a hotel room for the night because I don’t want it happening in our home.

Last night my partner goes “you should make a tinder account.” And I asked why to which his response was “so we can find people who want to fuck you and I can film in.” While I’m not opposed to being filmed, we have never discussed having someone else fuck me, while he controls the camera from another room. He is convinced that we’ve had this conversation before, and even recently, but the conversation screenshots he sent as “reference” to it was us talking about having a threesome. I brought up how I did not want it happening in the house and he got irritated and said just forget it.

I mentioned that we haven’t even had a threesome yet, and he wants to jump into this, to which I’m not quite sure how I feel about it yet? Like why can’t we just take adding new things in slow? How am I supposed to feel okay with this tinder request?