This is her consent if she’s sharing her private images with you but if you have any issues with it then you should simply deny her sharing such pictures with you as you’re not comfortable. If she still keeps on sharing then you should take a step back and rethink whether she is trustworthy or not. If she is trustworthy and you think that you both will be safe then you can continue with whatever you are having between you two. But if you doubt her a little then you should either warn her to stop sharing or should get separated from her and get rid of such insecurities.