"Ooh, RoseWriter - turns out Becky was having an affair before the wedding! Like, even when we were on her hen weekend!"
"Oh. Gosh."
"What? You knew! You knew, didn't you?"
"No, no. I mean, might have suspected..."
"No, you bloody knew! And you didn't tell us, and you organised everything, and you took people's money, and you walked down the aisle with the best man, and you stood there and listened to the vows - even 'if anyone knows a reason' - and you did the speech and you bossed everyone about..."
"What was I supposed to do?"
"You utter shit. You were in on it! You enabled this whole shitshow."
"...well, I consulted Mumsnet, and it was all a bit ambiguous, so..."
"Get out of my sight. I just don't believe this..."
------
Of course, you could just lie. Like she's doing.