Very regretful, should not go to male classmate's party, husband really want to divorce, how to do?

Right now I'm all messed up.

My husband and I went to college together and have been married for exactly twenty years. The kid went to college this year, which was supposed to be the second easy two of us. But now life is messy.

A few months ago, another unit cooperated with mine. I was the head of the department here, and the head of the corresponding department of the other unit. It happened to be the male classmate of my husband and ME in college. I haven't been in touch with this male classmate for 20 years. I was just familiar with him when I was in school.

A project is a public-to-public affair, and there is no such thing as one begging for another. But because of the unit level, their unit attitude is lower than mine. By the end of November, it was over. I gave him some help in the process. Last Tuesday, my male classmates wanted to invite me to dinner to express their gratitude, but I declined. Then the male student said that some other students were also free, and the four of us, including my best friend from college, would get together on Friday. We hadn't seen each other for years. At that time, I also had a short circuit of thinking, because for several months, I had been working on the cooperative work, and my habitual thinking only considered the cooperative relationship in the work project. Along with meeting my classmates, I agreed.

The party is after work on Friday, before Tuesday promised male students to get together that night home, I told my husband, male students invited me to dinner on the weekend. But when I said that I helped him at work, the male student wanted to express his gratitude. When my husband heard me say this, he thought it was a project farewell party of relevant personnel from two departments, which was initiated by male students. My husband had no objection at that time.

When I got home on Friday night, I talked with my husband. He was furious when he learned that it was a classmate party, not a work party. He said it would be fine if we ate on business. There is no reason to invite a female student without her husband, who is also a classmate. The point is I said yes. Say: "you think it is work meal along get together classmate, classmate think it is a boy can alone ask out another boy's wife. "I also think that when I invited me to dinner to thank me for my help, I didn't mention that other students would also come, which was a deliberate omission of the whole situation. I was out of my depth.

The husband thinks, I, my husband, male classmate, three people are a class, if it is a job, I have a meal with the boy no problem, private party, male classmate absolutely did not bypass female classmate husband, alone about somebody else's wife have a meal of truth. What the guy did was, he challenged him, and I, the wife, gave him an assist.

Recall that day at the dinner table, the male students told everyone that his unit and my unit, cooperation for more than three months, he and I are respectively in charge of their respective departments. Seems to give the students caused a misunderstanding: I and my husband's relationship is weak? That day, everyone seemed to agree not to mention my husband, including the trivia of college days, only to talk about things without my husband.

My husband is angry, very angry, and thinks he has lost face in front of the whole class. No face in familiar circles. It doesn't matter what the boy did, what matters is that I cooperated and stepped on his foot. On Thursday, he went out to rent a house for a year. He said he was separated and became angry when we met. I sued if I did not agree to divorce. One no divorce, he sues in six months.

I admit what I did was inappropriate. How can I save my husband's face now? To calm him down? I could not explain to my classmates one by one: I had a mental short-circuit that day, because I had been cooperating in work, and I regarded the male student as a colleague in work first, instead of treating the party as a classmate party. If it was a reunion, unless it was an all-girl reunion, I would definitely show up with my husband.