coldreactive:
In Final Fantasy XIV, you have a special teleport skill you can use to teleport to your married person, as well as an “Embrace” emote.
In LaTale, married couples have a “Couple Level,” which levels up as you do content together, as it levels, you get more and more skills such as HP Restoration, Teleporting to each other, and more.
Eden Eternal had a similar system to LaTale.
Perfect World International has a special quest you do before you can get married. You have to beat a special world boss. After you do, and are married, you get special daily quests for rewards.
Those features are kinda lame, being married means that two peoples are attached to each other, the system should offer something that benefits that, or curses based on that.