Target Sim is Married, and it’s something of a problem. [MCCC Help Desperately Needed]

Yeah that has happened to me plenty. I just move them out then use MCCC to maintain sim->divorce->forget relationship. I have learned if I don’t t want the game or MCCC to control my sims relationships, I have keep them as “played” households or make them “potentially played” households. If there are particular NPC’s that behave badly and try to move in on my sims, I marry them off to some other NPC.