there is a condition to get married which likely will be out in v4, both of you need a certain amount of game money, i think it was 50k.. divoice also costs money..
when it is released you get married at holy church, there a npc outside the church at one of the stalls who you pay the money too

there is actually a thread on this on the actual wl forum... still there every chance v4 be out this month given they advertised v3 about 3 months before release and v4 advertised in jan