Since I started rewatching Arifureta and finished rewatching "Welcome to Japan Ms Elf", while working the morning I had a thought. So imagine this brothers..

The other isekai method, you get summoned to the isekai world. You do your duty, save the world, meet your isekai waifu, she devotes her life not only to your journey but gradually falls for you.

You are on the journey for upwards of a year, you travel together, eat, sleep, night battles.. then wham! Your journey is done, you fulfill the obligation to the world and are granted land and are hailed as a lord by the nobility (not going the betrayal route on this one).

At that point you are granted the ability to pass home, live in the new world or travel between. You can conjure a portal at will to any rally part of the other world but you can't teleport within that world just between worlds (IE from the US to Japan).

Your Isekai waifu stands with you on your decision and follows you wherever you go. Which do you choose to do?

Bring her back to your original world?

Stay in the isekai world?

Or travel between the two? (Since she can travel with you. There is no limit to how many people can pass through.)

Also consider the future in your decision.

Also letz hear your reason in comments.