Ten years god damn... I mean cheating is wrong but jesus woman. I'd say just divorce her but that's probably an entire ordeal with her being a princess.
I know the point of this story is just tits and ass but why not just do the summon in the earls courtyard or something? Better yet with the mind control bell use it to get one of the earl's servants to poison him. (Assuming the bell also works on humans)
Guys, if we can somehow Thanos snap every character in the manga besides him and her, stop all the trains, and get rid of fireworks, we'll get our confession and ending!