So there is a kidnap mod, it is an 18+ mod... but its only because of some... actions you can do. But it is optional for the player to do so.
You can just, kidnap... or kidnap and do said actions.
Mod
Mod Wiki
And since there are some... questionable things about it, you can ask me any question about it.
P.S MOD STILL BEING REVIEWED ON CURSEFORGE SO PLEASE DO NOT SHUT DOWN JUST YET.