How do you get divorced in the sims 2?

AnswerYes. A Divorce Between Sims Is Possible.

Bring Both Married Sims Relationship Down To Best Friends Or Friends Status Through Negative Social Interactions. For Example: Insult. Then Have One Of Them Attempt To "Kick Out" The Other Sim. That Other Sim Will State: "Fine, We Are Not Married Anymore. But I Still Live Here." Both Your Sims Will Be Officially Divorced & Free To Marry Another Sim.