@Abyss This situation is a bit special since they guys are the ones who enticed her into all this mix-up. The girl fell for both and now she is forced to choose or give up both... now it all comes down to what the boys think of which I am certain a few chapters ago they declared that they are fine with it. I feel like she is sincere too... thinking of both of them and trying not to be selfish.
We only live one in reality but countless times in fiction.