So we get married, invite 20 guests, some monster comes in and tries to steal/smash our furnishings.
We all beat the gate-crashing monster to a pulp and all the stuff he stole from some other poor sod's party we get to keep including as a bonus, maybe a belt but only the married couple gets the chance of a belt?
I've been to some parties in my time but (pardon the pun in advance) this definitely takes the cake.
I'm sorry but I'll give this one a miss. I did do quite a few pirate event runs and need a rest. Looking for twenty guests who'll be willing to stay in my house, let alone getting married in-game isn't possible.