Gates McFadden talked about this on her podcast this week (with guest Jack Quaid):

“I was in the audience I had come with a friend who was a writer [on SNL] and she said "let’s sit here” and she was very specific about where we were gonna sit, and they knew he was gonna jump down […] being kissed on the mouth. I had totally forgotten about that, like did not even remember that I had been there live […] I wouldn’t have recognized it was me had it not been the sweater.“

Star Trek: Picard cast photos by Ryan Pfluger for The New York Times