My wife is TOO trusting of me, but if I err, which happens, she's not critical, we talk it over and try to avoid the same thing again. It works.
I have a somewhat similar situation coming up end of August, a very good friend of hers is having his 90th birthday, and hosting some "party" at his condo overlooking the fireworks thing up there. Fortunately, my step son has taken over many of the arrangements and he's very good at it, and it's a smaller group overall and I know most of them. I dislike "parties" with 30+ people where I know maybe 10.
This very good friend of hers I personally find exceptionally annoying and wish to avoid, but with ~ten people around it won't be hard, I can smile and chuckle and seem agreeable to whatever. Our other friends are coming over from France and it's good to see them, he was my wife's boss back when and President of the company, neat guy. So, net, it should be OK.
Oddly enough, I'm not a fan of fireworks displays. I may make some comment about how they are "chemicals" and pollution as this "very good friend" is your typical hyperliberal without knowing much of anything about anything. He is of Jewish decent and after Trump was elected in '16 told me he expected Trump to expel all the Jews from the US. I asked him if that would include Trump's daughter?
I probably won't mention chemicals though, but I might depending.