@skematica You'll have to invite them to your timeline. It's a bit inaccessible at the time -- click the timeline name, then go to "access control". You'll be able to invite people by e-mail address there. I have an idea I'm working on, where you send the link and then the other person enters their e-mail address. Goes back to you, then you can approve/reject the request. But it isn't implemented yet. Sorry.. :-(