The adj mutual has 2 senses (first 1 from tagged texts)
1. (3) common, mutual -- (common to or shared by two or more parties; "a common friend"; "the mutual interests of management and labor")
2. reciprocal, mutual -- (concerning each of two or more persons or things; especially given or done in return; "reciprocal aid"; "reciprocal trade"; "mutual respect"; "reciprocal privileges at other clubs")