I have one collaborator from another country for whom I have great admiration. In fact I'm learning a lot with her and I think she is amazing both professionally and as a person, and I would like to have a friendship with her. Notice that it is really just friendship I'm interested in.
Now, that said, we mostly work together remotely since we are from different countries. Recently we had an opportunity to work together in person for some time and it was great. That time is almost over now and I thought about asking if she wanted to have some coffee or something on the weekend.
The thing is: I'm afraid she might misunderstand and think I'm interested in something other than friendship, when that's really not the case. If it were a male colleague with whom I would like to establish a friendship I would consider this to be natural and wouldn't worry, but in this case I'm really afraid of a misunderstanding, especially since both of us are engaged.
How can I invite her to hang out without giving the impression I'm interested in something more than friendship?