Narrowing it down some more to not only 1) Stevie Lew mentions 2) on evening shows 3) in January-February, but also times 4) when April (presumably) wouldn't have been co-hosting at the time and 5) when Aaron was making eye contact with a proverbial "corner demon" a lot more than usual, I'm 99.99% sure it was the
January 31st STES starting at
timestamp 19:53 when something in the room got him so excited that he almost did a spittake, set down his beer and made a "hello what's this" face at something, followed with his eyes as though that attention-getter gradually walked toward the end of his desk, and then made a big thing out of aiming, zooming, and tapping his phone camera toward that end of the desk. If it had been any other time, that time sure would have been a lot less conspicuous than this:
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Frankly it's astonishing that Aaron didn't think to delete that episode at some point, but it was nice of him to leave it up and point out where to look, for one last humiliation of Nick while the RP case winds down. For a long time it sounded like the only swinging going on was when the full Qover were all hanging out together at the same time and place, a juxtaposition which would make each cuckee's consent most clearly implied to his respective cuckor, but this clip makes one wonder how many times Kayla may have just disappeared to Aaron's place on her own to prance around topless and continue on to... "other adventures" as Nick likes to say.
Did Nick even have any idea what Kayla was up to that night?