I haven't read everything written about Doctor Goo yet, but has anybody thought about the idea that it's Doctor Goo that has a "relationship" with River.

The way the encounters between the Doctor and River occur, both Doctors could see her at different times and she wouldn't be able to tell the difference. Although it wouldn't work in a sequential timeline, it could work in the timey wimey one that River and the Doctor have in common.

That might be an answer to the alluded romance between the two of them.

Just a supposition add to the ever growing pile since anything is a possibility with Moffet.

Unless it's not just their necks that stretch.

Hey - maybe that's why she was dressed up as an astronaut when she killed the Doctor. She was wearing that for - you know - "role play" - and suddenly - WHAM!!! - there's Doctor Goo's enhanced talent in all its glory - so she nips through time and kills the real Doctor so she can keep the new improved version to herself.

Well, if it's good enough for Amy and Rory....

I hadn't thought of that, but it's an interesting possibility.