Sharing room while travelling Au Pair

Ok so the HF and I 20f are about to go on holidays for a week. Let me preface by saying I'm super lucky to be going with them, it's only a few hours in a car but it's still such a privilege and I'm not overlooking that. Anyway so I'm working when I'm there, this doesn't count as holiday days and I'm still expected to work the normal 5.5-6 hours a day. This is all fine, however, the place we are staying isn't too big and the HF said I'll be sharing a room (not a bed) with the son 9m. I really feel uncomfortable by this, he has had a crush on me since I started which like, yeah kids do that, but he's tried holding me down and kissing me on the mouth and stuff like that before. I know he's not going to wake up at night and do anything gross obviously but I still hate the idea of sharing a room. Am I overreacting? I'm probably not going to do anything about this (don't even know what I could do) but I really needed to vent and hear some other AP thoughts.