This is the main non-gameplay complaint I have with BG3. There's so many possible relationship plotlines you can pursue simultaneously with everyone in your party, and its impossible for them not to notice, and there's no jealousy?
Even Shadowheart & Lai'zel, who hate eachother, are fine with sharing you? And not only is everyone bisexual, if you choose another species as a character... they're fine with that?
In Mass Effect 1, if you pursue relationships with Liara and Ashley, or Liara or Kaiden, near the end they both confront you and say "You Gotta Choose One Of Us." Which is an entirely reasonable ultimatum.
In Witcher 3, if you try to get with both Triss & Yenniefer... they tie you to the bed, and both relationships are done.
And those are 17 & 9 year old games.
Also, somewhat related, in my 2nd playthrough I comically made every all the BG3 companions prance around naked in camp, just because I thought its bizarre you're given that option to do so, and... nothing happens. No objections by anyone that they can see eachother naked, no additional dialogue whatsoever.
And after saving Shadowheart's parents in Act 3 the next long rest you have she begins pouring her heart out about the decisions she's made... while 100% naked... and her parents show up and.... no objections whatsoever... no 'My God Jenevelle! Put some clothes on!' They hug and everything while she's naked.
Only in video games.