A meeting –not the “sit down, talk and take minutes” kind, but the “get together and do stuff” kind. You and some of your friends are nominally in charge of the group but under much pressure. When the meeting is well underway three of the antagonists come in, all together (well, A and B are married to each other so that’s to be expected, but C lives somewhere else), looking as smug as cats, and take their places and start doing what they’re supposed to be doing without a word.
Doesn’t that look as if they’ve been planning a coup?
No coup ensued, this time. I hope it was fiction after all.