Obviously it got lost in translation, but from what you wrote I just got the idea that because she's a non native speaker you can't take what she says as truth, which is a little bit of a dodgy area, in my opinion. I'm not having a go, like I said, I just want to make sure that this doesn't end up making Bianca feel bad for something she said in passing.
What I find more ridiculous is that this is quite clearly a case of crossed wires - Laurel responded to something that Bianca said, which she had no reason to believe wasn't 100% truth, when really, it was just worded in what seems to have been a misleading way, then this all kicked off, when really Laurel was talking about something which, we have discovered didn't actually happen...yet there are still debates going on.
But like I said, I just want to make sure Bianca doesn't get upset about this, because as we all know she's a very sweet girl and I think she'd be gutted to find that there have been arguments since she made an off hand comment.