> I think there's a risk she'll be handsy with me, groping etc

So...maybe stand a little further away? Or when you meet say you're getting over a cold and you don't want to hug? There are dozens of options here other than judging this woman who you don't know. Smile and say "Hi, nice to meet you!" and go from there.

>which is something that she does at group parties, and yes, even with other people's partners.

You've seen this happen? With your own eyes? What does handsy mean? I hug/touch other women at parties besides my partner. Am I being handsy? I guess I just don't understand what you mean.

This is just one of those things when you're an adult that you're going to have to do once in a while, and who knows, maybe you'll get along really well.

Somehow I don't think this woman is going to grab your boobs at a party or whatever. I think you'll be fine.