Incesttuous
Incesttuous (?; 135) , adjective
[Latin incestuosus: compare French incestueux.]
1.
Guilty of incest; involving, or pertaining to, incest; as, an incestuous person or connection. — Shakespeare
Ere you reach to this incestuous love,
You must divine and human rights remove.
2.
resembling incest; between people or groups so closely related as to make such activity improper or unethical; as, an incestuous coziness between the management of the company and its union; an incestuous relationship between the salesman and the purchasing manager.