My main issue is... Well. They're 99% likely to be related. All of them.

F.ex. there were quite a few Amy/River shippers back during S5. So a rule of thumb: Don't ship Moffat characters until you know who they are. (Moffat plots are generally resolved through people claiming each other as family.)

Mind you, if they *do* go the 'love-triangle' way, it'll definitely be the River/Clara route.