I think you can still use the prior separation agreement if all is still agreed to but would need to have it updated for the new date of separation. You don’t HAVE to use it since the separation became void when you two reconciled.
"A party defending against an action that includes allegations of marital fault also has certain common law affirmative defenses to the fault allegations. These defenses have technical names: condonation, connivance, collusion and recrimination. The most commonly used of these defenses is condonation, which stands for forgiveness of the particular fault. For example, if your spouse has engaged in illicit sexual behavior with someone else and then you have sex with your spouse knowing about the illicit sex, in the eyes of the law you may have condoned the fault"
I am not positive but I believe that since she condoned the affair by the above example, she would no longer be able to use it for alimony. She may still be entitled to it if she is dependent spouse but the duration of it may be determined as you did before “…until she found a job.” instead of an undetermined amount of time due to the affair. As I said though, if the prior separation agreement is still agreed to, then have it updated for the new date and use it. You may want to look at your separation agreement to see if there is a claus in it about reconciliation.
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