Correct ! Been there done that. ...got scars to prove it ...let's just say if you are having these doubts about her or about the ' investment' situation ..you would be wise to take heed . With the right person the doubts should be zero or minimal beacuse that person would have as much to loose as you have ...Just because she never asked for anything in since you've been together maybe tells you she is a nice gf but it doesn't qualify her as a co-investor in a property deal . Maybe that's the big prize...waiting to happen .
Now , if you come with 50 and she comes with 50 then maybe - but I would still sleep with one eye open .