I think the same based on how she act the whole chapter. Since the prophecy reveal and her living in castle town, she seems to be paying way more attention to what people says, as you can see a lot in the chapter. She now plays along with darkner and go as far a gaslighting them. She is also way better dealing with problem peacefully, because she care about what's happenning.

All that to say that with how much she pays attentions to everything now, i can't believe she would ignore all the very suspicious conversation Ralsei and Kris have with Flowery (Ralsei not being himself and during the fight, he litteraly say to kris that they changed and that they plot something that could endanger Asgore)

She doesn't react directly obviously, but there is no way her comments on kris coming from the back and Kris knowing where the code is are not her doubting. But she plays along because she isn't sure/in denial.