My coworkers and I had lunch with one of our peers that was retiring. We had planned a party and everything but we had bad weather closure days and she was taking some of her time, well came down to the week of her retirement so we group of 10 office clerks/secretaries decided let's just treat her to lunch. I placed the order for everyone the day before and we pitched in and paid for her lunch. It was very impromptu, no decorations, no cake just lunch. In fact prior to this lunch, almost everyone had dropped their gift off by her office. Sooo, the day comes, lunch is delivered, four of the 10 of us can't step away to join so we grab our lunch and tell her we will see her definitely before she leaves by the end of the week. I leave the building (had to pick up my child from school). I come back 45 minutes later. Lunch is over, I go in to the room we used - huge conference room- more than enough space for social distancing- I go and get some ice that we had for our tea we ordered with lunch. A few of the ladies said it was nice to just have lunch together as a group again. I go back to my desk .... I received an email from the administration saying that who planned the retirement luncheon and why weren't they invited. They take the lead on the parties and why were they not informed of the plans to have a luncheon for her. ??????? What? I was floored. It was nothing like that. It was our group of coworkers just gathering for one last lunch together. Annndddd I didn't even attend. So I explain the entire scenario, planned to have one didn't happen, than as a collective group we just wanted to do lunch. Which we always do. She also copied two other managers on the email.... So I replied to the entire group. Well now apparently they are waiting for me to apologize. By the way they have never eaten with us. In the 3 years I have been in this specific department none of the managers have ever eaten with us. And this isn't the first time we did just lunch for someone whether it's for a birthday or retirement. One of the managers actually confronted me screaming that we had a party and didn't invite her. I am still in shock about that part. But as of Friday two of the three want an apology. I am literally at a loss about this. Oh and by 4pm Friday almost everyone knew we had a PARTY. Anyways had to give a back story because now my boss is trying to intimidating me into giving her an apology. For something that was just a gathering of coworkers for lunch. Do I need to apologize? We had no party and well no one wants managers at their lunch.