You seem to miss the issue. Not being forced into the decision would be ideal. You've got the ability to opt out of every other thing even remotely leaning towards sex. Being leglocked here is a dumb decision. Far be it for I to pitch for monogamy given I already know what Savin has planned for the character. I don't care about Etheryn at all. I'm stating a weakness.Well if that's your worry then yeah you can chill out. Nothing about post cage Ryn indicates she's suddenly going to go full chad thundercock, more's the pity. As for the post quest scene, expecting monogomy this late into development after everything that's gone before just seems like setting yourself up for disappointment. Click past the scene, from what others have said it doesn't even detail what happens, then go on as if it never happened.
And that is one. No matter how much you (personally) don't mind. Other people clearly do.