A girlfriend whom a married man has a soulmate and true confidant and has primal connectness with.
The difference of that and a mistress is she is the only one/not interchanable and he wishes he was married to but circumstances make it impossible.

A true tragic modern day love affair that can last forever as it’s draw is so intense and magnetic.

Anatidaephobia is defined as a pervasive, irrational fear that one is being watched by a duck. The anatidaephobic individual fears that no matter where they are or what they are doing, a duck watches.

Anatidaephobia is derived from the Greek word "anatidae", meaning ducks, geese or swans and "phobos" meaning fear.