I hope that this little girl is found safe and well.
No one should have the right to hurt another but the truth is that it happens.
However when you have kids you forfeit the right to total freedom and they always come first. The parents should never have left their 2year old twins and a 3yr old alone in a room in a strange country and especially when they could have taken up the babysitting offer.
I am sure they relaise that now.
We went on holiday last year but my kids were with me and that was the way it had to be. I wouldn't have had it any different.