Fix areSisters() false positives

I noticed that sometimes a slave will be described as a sister of the PC even though they aren't related.

merged

mentioned in commit a54e27d7

Dredging this up to comment. Make sure to check both parents for the slave and PC for the circumstances and to check the relation comment stuff in, extendedFamilyWidgets? I think it is.

areSisters() has been working fine for a long time before now, so I am beginning to think the Js is not the problem.

And now it looks like it might have been a false alarm. Hope I didn't bother you.

And now it's not. Here's a save though.

free-cities-20180306-120948.swf