Two of Ina's Steam friends, AhtiIsAmazing and Maguro have often been playing in multiplayer BG3 lobbies from around 8pm - 12am PST for a couple weeks now. One of them (Maguro) typically hides their game status during this time, which I thought was odd.
This is the friend in question
https://steamcommunity.com/id/n1neteen (Maguro)
We can see that he uploads a lot of screenshots
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and in one of those screenshots we find the following:
https://steamcommunity.com/sharedfiles/filedetails/?id=3037253458
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This is the relevant part:
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In BG3 you can vote on dialogue options when your party member is talking. Your vote is represented by your steam profile pic.
The profile picture above matches Ina's personal account,
https://steamcommunity.com/id/leggomygekko. She's a mutual friend with everyone in this lobby. You can double check this yourself if you want by running it through steamID.uk:
https://steamid.uk/profile/76561198079221781
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(The other two players can be proven in a variety of ways but this screenshot sums it up nicely.)
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Matching up all the steam profile images to names the other players are Ahti (AhtiIsAmazing, as mentioned earlier) and Miyuki (miyukihime, has game/friend status hidden).
Maguro has played this game a lot on his own time, but thankfully Ahti has seemingly only ever played this game multiplayer:
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(At least, the 6 or 7 times I checked he was only ever in a multiplayer lobby. I don't have a problem.)
This clocks Ina's playtime in at around 27 hours. This includes today, their session went from about 10:30PM until 12:30AM PST, Ina made a member's post ~3 minutes afterwards.
There's some other details I gleaned by watching through streams of Maguro's solo BG3 game and by comparing some steam achievement timestamps, but this post is long enough as is. The steam screenshots alone get the point across.