mutualness
/ˈmjuːtʃʊəlnəs/ /ˈmjuːtʃ(ʊ)lnəs/ /ˈmjuːtjʊəlnəs/noun
The quality or state of being mutual; reciprocity; interdependence.
Origin
Early 17th century; earliest use found in Thomas Granger (1578–?1627), Church of England clergyman and author. From mutual + -ness.