I'm so sorry. What utter bastards. I've been spiked, and so have a few of my friends. I wasn't sick but they were. The feelings you get from having part of your history stolen from you (that's how I felt, anyway) are really weird and they do keep coming back until you've talked to someone who knows what they're doing.
It must be difficult trying to be in the moment, on holiday with your kids, while this is going on in the back of your mind. As much as you can, treat yourself like you would your best friend if they were distressed or unwell. You need good food, distractions, and safe company.
Depending on your roaming charges, it could be worth ringing Samaritans and/or Rape Crisis while you're away. I can't overstress the importance of being able to talk properly about it. If you can't afford it, you're stuck with us until you get home 
Totally agree with reporting them to the police. You have some evidence, and at least your report will help them when this dreadful couple do the same to someone else.
You know it wasn't your fault and you didn't ask for it, but I'm telling you anyway! It was him, not you. He's a sleazy criminal. You're a nice woman 