You can move back in with your spouse for up to 90 days before the "clock goes back to zero". In other words, if you separate from your spouse and you decide that you made a mistake and want to resume your marriage, you can move back in with you spouse for up to 90 days before you would have to start a new separation period of one year – if you separate again. If you are separated for three months, move back in for two months and separate again, you could file for divorce after another nine months. If, however, you live together for over 90 days during your separation period, the one-year separation period must start anew if you later decide to divorce again.