There are many benefits to being married in Revelation Online, the first being that you will both unlock a cosmetic title which has your partner’s name within it.
You will also unlock a new action which you can use at the Hot Springs. You can find this action by pressing ‘N’ (default), its respective icon appearing as a hand with 3 orbs above it (there is another similar icon which is for mentoring). While it is visually similar to the mentoring action, it actually has many differences. There is no daily time limit at all on the use of this action and it gives a boost to the experience you gain from drinking Wine within the Spa (the boost amount itself depends on your level). It is worth noting that you will not gain any intimacy points from this action.
The third benefit you receive is additional weekly valor reward points earned within the battleground for both you and your spouse. However, this only applies when playing in battlegrounds together.